14 METI, OCCTO and JEPX notices in the last 7 days; latest: OCCTO 2026-10-23 — 2026年度 年末年始期間中の広域機関システム利用申請のスケジュールについて（再周知）. Weekly digest 2026-W43 covers 40 items.
- Notices 7d
- 14
- Latest digest
- 2026-W43
METI · 資源エネルギー庁 releases · OCCTO · JEPX notices · EGC 制度設計・監視専門会合 · refreshed hourly · last 23 min ago
EGC meeting pages: access blocked by the site (HTTP 403) at the last daily check — not bypassed; next probe 第25回
Policy & Regulation Watch
Weekly policy digest · 2026-W43
Generated 2026/10/19 0:13:07 for 0 portfolio areas / no technologies · 40 notices considered · auto every Monday 08:00 JST
Japan Power Market – Policy & Regulation Digest, 2026-W43 (19–25 Oct 2026)
Portfolio note: the portfolio profile supplied is empty (no areas, technologies, scenarios or alerts). Items are ranked by general relevance to a renewable developer / IPP / PPA offtaker / trader. Latest notice in the feed is dated 16 Oct 2026; no area-level market data was supplied.
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1. Top 3 regulatory developments
#1 – Capacity market business manuals (FY2027 delivery year) open for comment – closes 26 Oct
- 13 Oct 2026, OCCTO – Call for comments on Capacity Market Business Manuals (Requirements/Penalties, Contract Payments, Contributions), delivery year FY2027. Comment window: 13–26 Oct 2026.
- Why it matters: this is the only live consultation with a deadline inside this week's horizon. It fixes how FY2027 capacity awards are assessed and penalised, and how 容量拠出金 are invoiced. Owners of storage / dispatchable renewables with FY2027 awards face the requirement/penalty side; retailers and PPA offtakers face the contribution side, which is passed through into supply and PPA pricing.
- Related: the FY2027 practical briefing on requirements/penalties (29 Sep, OCCTO) and the contribution-payment briefing (8 Oct, OCCTO); July and August 2026 contribution parameters were published 14 Sep and 15 Oct respectively.
#2 – Long-term decarbonized power source auction (FY2026 bidding year): schedule set
- 9 Oct 2026, OCCTO – Registration and bidding schedule for the Long-Term Decarbonized Power Source Auction, bidding year FY2026. Staged registrations run from 13 Oct 2026; bids due by 26 Jan 2027.
- Why it matters: the auction offers 20-year capacity contracts for new decarbonized capacity (storage, hydrogen, renewables-linked assets). The procedures manual (30 Sep, OCCTO), updated FAQ (15 Sep, OCCTO) and the practical briefing notice (25 Sep, OCCTO) are all published; the 30 Sep manual on capacity-outage plan adjustment (two years ahead, FY2027/FY2028) also binds winners to outage-coordination requirements with penalty exposure.
#3 – Generator-side charge (発電側課金) unit prices revised from 1 Nov 2026
- 29 Sep 2026, EGC (電力・ガス取引監視等委員会) – 24th System Design and Monitoring Meeting, Document 5: Revision of Generator-Side Charge Unit Prices.
- Why it matters: area-specific kW and kWh charges change for all generators, including FIT/FIP and corporate-PPA assets. Cost pass-through clauses in bilateral and PPA contracts should be checked before the 1 Nov effective date. Document 4 of the same meeting covers 需給調整市場 operation (relevant to imbalance exposure and ancillary-service revenue); Document 3 is the Apr–Jun 2026 competition monitoring report.
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2. Other notable notices (by topic)
Renewables & curtailment
- 1 Oct, OCCTO – Approval of amendments to rules on renewable-energy operations (FIT/FIP settlement, levy and grid-coordination procedures); review for compliance changes.
- 30 Sep, OCCTO – Verification results for Hokkaido (北海道) variable-renewable curtailment due to supply-demand balance constraints, August 2026 – monthly datapoint for pricing curtailment risk in Hokkaido projects.
Grid access & interconnection
- 28 Sep, OCCTO – New forms for the grid connection study application (接続検討申込書); use the revised form to avoid queue delays.
- 28 Sep, OCCTO – Updated grid-access process flow for generation facilities.
- 28 Sep, OCCTO – Quarterly disclosure of grid-access applications/responses (Apr–Jun 2026) – benchmark for connection timelines and congestion hotspots.
- 29 Sep, OCCTO – FY2026 4th Operational Capacity Review Meeting materials (interconnector 運用容量) – inputs for area-spread and curtailment expectations.
- 15 Oct, OCCTO – 105th Wide-Area Grid Development Committee notice (aging-equipment renewal guideline); 16 Sep – 104th meeting notice (interregional expansion).
- 5 Oct, OCCTO – 17th Plan Evaluation and Verification Subcommittee materials (transmission/supply plan review).
Supply-demand & balancing
- 16 Oct, OCCTO – 123rd Committee on Adjustment Capacity and Supply-Demand Balance notice (draft supply-demand verification report, balancing-market updates); 29 Sep – 121st meeting minutes; 16 Sep – 122nd meeting notice.
- 16 Sep, OCCTO – Results of the FY2026 reserve power source (予備電源) solicitation for FY2027/FY2028 – informs adequacy and scarcity-pricing assumptions.
- 2 Oct, OCCTO – FY2026 periodic disaster-response equipment survey.
- 28 Sep, OCCTO – Designated times for FY2027 weekly plans (scheduling/outage submission timing).
Capacity market (other)
- 16 Oct, OCCTO – Updated briefing materials/video (capacity-outage plan adjustment, FY2027/FY2028; FY2030 main auction registration/bidding).
- 16 Oct, OCCTO – 77th Study Group on the Capacity Market Framework notice – tighter supply-certainty / effectiveness-test requirements flagged for 発動指令電源 (DR/storage aggregators).
- 14 Oct and 16 Sep, OCCTO – Public naming of members in arrears on 容量拠出金 – a counterparty credit signal for PPA/offtake screening.
OCCTO governance & systems
- 7 Oct, OCCTO – FY2026 2nd Board of Councillors (proposed rule and grid-guideline changes).
- 7 Oct, OCCTO – Extraordinary General Meeting convened for 2 Nov 2026; member votes due by 30 Oct.
- 5 Oct, OCCTO – Client certificates expire 31 Oct 2026 – renew to keep member-system access.
- 29 Sep, OCCTO – Temporary suspension of the Member Information Management System.
- 17 Sep, OCCTO – Consultation on accounting/procurement rule changes (closed 8 Oct).
- 15 Sep, OCCTO – Consultation on 確定使用量通知 business protocol standards (closed 5 Oct).
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3. Upcoming deadlines / consultations
| Date | Item | Source |
|---|---|---|
| 26 Oct 2026 | Comments due: Capacity Market Business Manuals, FY2027 delivery year | OCCTO (13 Oct) |
| 30 Oct 2026 | Member vote deadline for Extraordinary General Meeting (held 2 Nov) | OCCTO (7 Oct) |
| 31 Oct 2026 | OCCTO client certificate expiry | OCCTO (5 Oct) |
| 1 Nov 2026 | Revised generator-side charge unit prices take effect | EGC (29 Sep) |
| From 13 Oct 2026 | Staged registrations, Long-Term Decarbonized Power Source Auction (FY2026 bidding year) | OCCTO (9 Oct) |
| 26 Jan 2027 | Bid deadline, Long-Term Decarbonized Power Source Auction | OCCTO (9 Oct) |
| Closed | Accounting rules consultation (8 Oct); 確定使用量通知 protocol consultation (5 Oct) | OCCTO |
Meeting dates for the 77th capacity-market study group, 123rd balancing committee and 105th grid committee are not in the notices supplied; check the linked pages.
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4. Market context
- JEPX day-ahead system price, 19 Oct 2026: average ¥29.90/kWh (min ¥21.61 at 01:00, max ¥44.09 at 16:00), up ¥12.84 day-on-day and well above the 7-day (¥22.34) and 30-day (¥19.16) averages. Midday average ¥28.58 vs evening average ¥37.02 – a mild midday depression (ratio 0.956), no floor (¥0.01) half-hours and no spike half-hours. Traded volume 1,000.8 GWh (sell bids 1,320.5 GWh, buy bids 1,359.2 GWh). No area prices were supplied, so no area-split or congestion comment can be made this week.
- Non-fossil certificates (latest prints): FIT 非化石証書 ¥0.40/kWh (31 Aug 2026); non-FIT renewable ¥1.21/kWh (28 Aug); non-FIT any ¥1.20/kWh (27 Aug). The roughly ¥0.8/kWh premium of non-FIT over FIT certificates remains the key value lever for FIP/corporate-PPA environmental attributes.
- Imbalance regime reminder (in force since 1 Oct 2026): imbalance price = max(調整力 marginal kWh price, 需給ひっ迫時補正), with the 補正 index at C = ¥300 below 3 % reserve, D = ¥50 at 8 %, and 0 at ≥10 %; the 累積価格閾値制度 caps the 補正 at ¥100 after 30 half-hours with area spot ≥ ¥200 in 7 days. With no spike half-hours on 19 Oct, no threshold trigger is indicated in the data provided.
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5. Recommended actions
- File comments by 26 Oct on the FY2027 capacity-market manuals, focusing on requirement/penalty assessment for storage and dispatchable renewables and on 容量拠出金 invoicing; reconcile July/August 2026 contribution parameters (14 Sep, 15 Oct) against invoices and pass-through terms.
- Before 1 Nov, re-open generator-side charge clauses in PPAs and bilateral contracts using the EGC Document 5 unit prices; in parallel, confirm the 1 Oct renewable-operations rule amendments do not change FIT/FIP settlement obligations.
- Decide go/no-go on the long-term decarbonized auction now that registration has opened (13 Oct) ahead of the 26 Jan 2027 bid deadline; model the two-years-ahead capacity-outage coordination obligations (30 Sep manuals). Housekeeping: renew OCCTO client certificates before 31 Oct and cast the Extraordinary General Meeting vote by 30 Oct.
120 notices
English summaries and implications generated by Claude from the original Japanese documents · click to open the source
2026-10-23OCCTO 広域機関情報提供・周知発電販売計画等・作業停止計画
FY2026: Scheduled Master-Data Notification Dates During the Year-End/New-Year Period (Re-notice)
2026年度 年末年始期間中のマスターデータの通知予定日について（再周知）
- –Re-notice dated 23 Oct 2026 for operators affected during the FY2026 year-end/New-Year period; repeats the 26 Feb 2026 notice without changes.
- –Applies to operators newly starting generation-sales or demand-procurement plan submissions, and those changing master-data registrations.
- –Deficient master-data applications cause plan-submission errors; plans cannot be submitted.
- –Plans are accepted only via the OCCTO system; no e-mail or other alternative exists.
- –Details are in the linked notice on master-data notification dates for GW/year-end/New-Year periods.
→ New generators or PPA counterparties starting plan submissions over the holidays must complete accurate master-data registration early, as submission errors cannot be bypassed.
2026-10-23OCCTO 広域機関情報提供・周知発電販売計画等・作業停止計画
FY2026: Schedule for OCCTO System Usage Applications During the Year-End/New-Year Period (Re-notice)
2026年度 年末年始期間中の広域機関システム利用申請のスケジュールについて（再周知）
- –Re-notice dated 23 Oct 2026 for operators planning to submit OCCTO wide-area system usage applications during the FY2026 year-end/New-Year period.
- –Repeats the 26 Feb 2026 notice; content unchanged.
- –Depending on submission date, operators may be unable to submit plans to the OCCTO system until application results are notified.
- –Specifically affects new system applicants and operators whose client certificates are near expiry.
- –Details are in the linked notice on master-data notification dates for GW/year-end/New-Year periods.
→ Developers and traders should file OCCTO system applications or renew client certificates well before the year-end holidays to avoid plan-submission blackouts.
2026-10-21OCCTO 広域機関情報提供・周知その他
Temporary Suspension of Updates to This Website (OCCTO)
本ウェブサイトの更新一時停止について
- –OCCTO has temporarily halted information updates on its website due to security countermeasure work; the site itself remains viewable.
- –Suspension starts around 21:00 on Wed 21 Oct 2026; resumption date is undecided. New notices and corrections cannot be posted meanwhile.
- –Supply-demand deterioration announcements will be made via the 系統情報サービス (grid information service) and OCCTO's official X account.
- –Dedicated systems operate normally: 広域機関システム, 容量市場システム, FIT納付金・交付金管理システム, 再エネ業務統合システム, 入札システム, 広域予備率Web公表システム, etc.
- –Enquiries on generation/sales plan submissions: check the FAQ first, then phone 03-6221-3315 (OCCTO General Affairs, PR Group).
→ Developers and traders should monitor the 系統情報サービス and OCCTO's X account for tightness alerts, as website notices may lag; operational systems remain unaffected.
2026-10-21OCCTO 広域機関Grid & curtailmentSupply-demand情報提供・周知需給状況悪化時の対応
Implementation of Supply-Demand Improvement Instruction for Kansai Transmission & Distribution (21 October, 15:40)
需給状況改善のための指示の実施について＜関西電力送配電＞（１０月２１日 １５時４０分実施）
- –OCCTO issued an instruction at 15:40 on 21 Oct 2026 under Electricity Business Act Art. 28-44(1) and Business Rules Art. 111(1) for the Kansai area.
- –Period covered: 16:00 to 16:30 on 21 October; Kansai Transmission & Distribution to receive 830.036 MW (83.0036万kW) from four neighbouring TSOs.
- –Contributions: TEPCO PG 600 MW, Chubu PG 30 MW, Hokuriku T&D 200 MW, Chugoku Network 0.036 MW.
- –Interconnector margin is used for the supply; stated reason is deteriorating supply-demand due to supply shortfall in the Kansai service area.
→ OCCTO invoking interconnector margin for Kansai indicates a tight late-afternoon balance; Kansai retailers, PPA offtakers and traders should expect heightened imbalance-price risk and verify their supply positions.
2026-10-21OCCTO 広域機関Grid & curtailmentSupply-demand情報提供・周知需給状況悪化時の対応
Implementation of Supply-Demand Improvement Instruction for Kansai Transmission & Distribution (21 October, 16:06)
需給状況改善のための指示の実施について＜関西電力送配電＞（１０月２１日 １６時０６分実施）
- –OCCTO issued an instruction at 16:06 on 21 Oct 2026 under Electricity Business Act Art. 28-44(1) and Business Rules Art. 111(1) for the Kansai area.
- –Period covered: 16:30 to 17:30 on 21 October; Kansai Transmission & Distribution to receive up to 900 MW (90万kW) from four neighbouring TSOs.
- –Contributions: TEPCO PG up to 549.978 MW, Chubu PG up to 220 MW, Hokuriku T&D 200 MW, Chugoku Network up to 0.066 MW.
- –Interconnector margin is used for the supply; stated reason is deteriorating supply-demand due to supply shortfall in the Kansai service area.
→ A second same-day OCCTO instruction signals an acute Kansai supply shortfall; traders with Kansai positions face elevated imbalance-price risk and should review real-time exposure for the evening peak.
2026-10-21OCCTO 広域機関Grid & curtailmentSupply-demand情報提供・周知需給状況悪化時の対応
Implementation of Instruction to Improve Supply-Demand Situation (Kansai Transmission & Distribution), 21 Oct 15:09
需給状況改善のための指示の実施について＜関西電力送配電＞（１０月２１日 １５時０９分実施）
- –OCCTO instructed under Electricity Business Act Art. 28-44(1) and Business Rules Art. 111(1) to improve supply-demand in the Kansai T&D area.
- –Instructed members: TEPCO Power Grid, Chubu Electric Power Grid, Hokuriku Electric Power T&D and Kansai Transmission & Distribution; instruction issued 21 Oct 2026 at 15:09.
- –TEPCO PG to supply 600,000 kW, Chubu PG 190,000 kW, Hokuriku T&D 200,000 kW to Kansai T&D between 15:30 and 16:00 on 21 October.
- –Kansai T&D to receive 990,000 kW in total; interconnector margin is used for the transfer.
- –Reason: supply capacity shortfall in the Kansai T&D supply area causing deterioration of the supply-demand situation.
→ A 990,000 kW emergency inter-area transfer for Kansai indicates acute afternoon supply tightness, raising imbalance-price risk for traders and offtakers short in that area during 15:30-16:00.
2026-10-21OCCTO 広域機関Grid & curtailmentSupply-demand情報提供・周知需給状況悪化時の対応
Implementation of Instruction to Improve Supply-Demand Situation (Kansai Transmission & Distribution), 21 Oct 15:40
需給状況改善のための指示の実施について＜関西電力送配電＞（１０月２１日 １５時４０分実施）
- –Title only: OCCTO issued a supply-demand improvement instruction for the Kansai Transmission & Distribution area on 21 October 2026 at 15:40.
- –The excerpt provides no details on instructed members, volumes or time windows; this follows a separate instruction issued at 15:09 the same day.
→ A second OCCTO instruction within about 30 minutes signals continued supply shortfall in Kansai; traders and offtakers with Kansai positions should check imbalance exposure for that afternoon.
2026-10-21OCCTO 広域機関Supply-demand情報提供・周知需給状況悪化時の対応
Request for Cooperation in Increasing Output of Generation Facilities to Improve Supply-Demand Conditions
需給状況改善のための発電設備焚き増しへのご協力のお願い（依頼）について
- –Title only: OCCTO issued a request (依頼) asking generators to increase output (焚き増し) at generation facilities to improve supply-demand conditions.
- –Categorised as information provision and response to deteriorating supply-demand situations; dated 21 Oct 2026. The excerpt is empty, so no further details are available.
→ Signals a tightening supply-demand situation; generators, PPA offtakers and traders should monitor OCCTO notices and spot and imbalance price risk under the rules effective 1 Oct 2026.
2026-10-21OCCTO 広域機関Supply-demand委員会・検討会将来需給シナリオ検討会
12th Study Group on Future Electricity Supply-Demand Scenarios: Meeting Notice
第12回 将来の電力需給シナリオに関する検討会 開催案内
- –OCCTO notice (updated 21 Oct 2026) for the 12th Study Group on Future Electricity Supply-Demand Scenarios.
- –Meeting on Tuesday 27 Oct 2026, 12:30-14:30, at Otemachi One Tower 5F &BIZ Conference Room B, with web participation.
- –Agenda: report on scenario-utilisation survey; status of area-level scenarios based on the national demand scenario.
- –Also: partial revision of area-allocation model case settings, interconnector model case settings, periodic observation (detailed analysis) summary, open discussion.
→ Area-level demand scenarios and interconnector model cases being set here will shape long-term grid planning assumptions that influence where renewable projects and PPAs can connect.
2026-10-16OCCTO 広域機関Supply-demand調整力等委委員会・検討会
Notice of the 123rd Committee on Adjustment Capacity and Supply-Demand Balance Assessment
第123回 調整力及び需給バランス評価等に関する委員会 開催案内
- –Meeting scheduled 26 October 2026 (Monday), 13:00–14:30, at OCCTO conference room O with Web participation.
- –Agenda: draft Electricity Supply-Demand Verification Report (電力需給検証報告書（案）).
- –Agenda: report on the status of deliberations at the Supply-Demand Adjustment Market Study Subcommittee (需給調整市場検討小委員会).
- –Agenda materials to be published the day before the meeting; page updated 16 October 2026.
- –Recording files to be released after the meeting until minutes are posted, in place of public attendance.
→ Developers, PPA offtakers and traders should watch the draft supply-demand verification report and balancing-market updates for signals on reserve margins and adjustment-capacity procurement rules.
2026-10-16OCCTO 広域機関Capacity market委員会・検討会容量市場検討会
77th Meeting of the Study Group on the Capacity Market Framework: Meeting Notice
第77回 容量市場の在り方等に関する検討会 開催案内
- –OCCTO notice posted 16 Oct 2026 for the 77th Study Group on the Capacity Market Framework (容量市場の在り方等に関する検討会).
- –Meeting scheduled 22 Oct 2026 (Thursday), 10:00–12:00, held online (Web開催).
- –Agenda item 1: measures to improve the probability of securing supply capability from demand-response resources (発動指令電源).
- –Agenda item 2: a mechanism aligned with the purpose of the effectiveness test (実効性テスト) for demand-response resources.
- –Instead of public observation, audio files etc. will be published for a fixed period after the meeting; handout materials listed but not shown in excerpt.
→ Aggregators and DR/storage providers bidding 発動指令電源 into the capacity market should expect tighter supply-certainty and effectiveness-test requirements, affecting capacity revenue assumptions.
2026-10-16OCCTO 広域機関Capacity marketSupply-demand事業者へのお知らせ容量市場
Capacity Market: Updated Briefing Materials and Video for FY2030 Main Auction Practical Session on Registration and Bidding
容量市場 説明会資料・動画の更新について（容量市場 実務説明会（容量停止計画の調整業務）（対象実需給年度：2028年度、2027年度））
→ Prospective bidders, including storage and dispatchable renewable owners, should review updated guidance on registering business, resource and expected-capacity information.
2026-10-15OCCTO 広域機関Grid & curtailment委員会・検討会広域系統整備委
Notice of the 105th Wide-Area Grid Development Committee Meeting
第105回 広域系統整備委員会 開催案内
- –Page updated 15 Oct 2026 announcing the 105th Wide-Area Grid Development Committee.
- –Meeting on Thursday 22 Oct 2026, 18:00–19:30, held online (Web).
- –Agenda: future issues and response policy from the trial of the aging-equipment renewal guideline.
- –No public attendance; audio files etc. to be published for a set period after the meeting, plus Webex recording with password to follow.
→ Developers and offtakers should track the aging-equipment renewal guideline discussion, as grid asset replacement policy affects connection timelines and network cost allocation.
2026-10-15OCCTO 広域機関Capacity market事業者へのお知らせ容量市場
Capacity Market: Publication of Capacity Contribution Fee Calculation Parameters for August 2026
容量市場 2026年8月分の容量拠出金算定諸元の公表について
- –OCCTO issues the August 2026 capacity contribution fee invoice notices (容量拠出金請求額通知書) on 15 October 2026.
- –Area-level calculation parameters for capacity contribution fees are published on the linked page for delivery year FY2026.
- –Linked page also provides an invoice verification tool, guidance for checking via the member information management system, invoice contents, schedules and reference materials.
→ Retailers and PPA offtakers should reconcile their August 2026 capacity contribution fee invoices against the published area parameters, as these costs flow into supply contracts.
2026-10-14OCCTO 広域機関Capacity market事業者へのお知らせ容量市場
OCCTO publishes names of members in arrears on capacity contribution payments under Articles 57 and 32-43(3)
定款第57条および業務規程第32条の43第3項の規定に基づき、容量拠出金の滞納を行った会員の名称を公表します
- –OCCTO board resolved to publish names of members that failed to pay capacity contributions (容量拠出金) despite repeated reminders and a formal demand letter.
- –Published members: 株式会社グルーヴエナジー (corporate no. 3500001023236) and エコエンジニアリング株式会社 (corporate no. 8150001014885).
- –Arrears relate to May 2026 capacity contributions; invoice due date 9 Sep 2026, demand-letter deadline 10 Oct 2026.
- –Basis: Articles of Association Art. 57 and Business Rules Art. 32-43(3); OCCTO also reports the cases to METI/ANRE.
- –Members must pay capacity contributions within one month of OCCTO's request under Art. 55-2(5); publication date 14 Oct 2026.
→ Retailers and PPA offtakers must budget capacity contributions carefully, as non-payment triggers public naming and reporting to METI, a counterparty-risk signal for developers and traders.
2026-10-13OCCTO 広域機関Capacity marketSupply-demandConsultation事業者へのお知らせ容量市場
Call for Comments on Capacity Market Business Manuals (Requirements/Penalties, Contract Payments, Contributions) for Delivery Year FY2027
「容量市場業務マニュアル（リクワイアメント/ペナルティ・容量確保契約金額/容量拠出金 関係）（対象実需給年度：2027年度）」に関する意見募集（意見募集期間: 2026年10月13日（火）～2026年10月26日（月））
- –OCCTO opens public comment on draft capacity market business manuals covering requirements, penalties, capacity contract payments and capacity contributions for delivery year FY2027.
- –Comment period runs 13 October 2026 (Tue) to 26 October 2026 (Mon), 14 days; deadline 17:00 on 26 October, email submission only.
- –Six draft manuals: requirement editions for stable, variable (single), variable (aggregate) and demand-response resources; penalty/contract payment edition; capacity contribution edition for retailers.
- –Capacity providers use attachments ① and ②; retailers and TSOs use attachment ③; comments in Japanese, max 1,000 characters each, may be published with company name.
- –Consultation held under Business Rules Article 6(1) and Article 32-5(2); OCCTO will not reply individually but will consider comments in finalising the manuals.
→ Developers with FY2027 capacity awards and PPA offtakers paying capacity contributions should review the draft assessment, penalty and payment procedures and submit comments by 26 October 2026.
2026-10-09OCCTO 広域機関事業者へのお知らせスイッチング支援システム利用状況
Usage Status of the Switching Support System (as of 30 September)
スイッチング支援システムの利用状況について（9月30日時点）
- –OCCTO published a compilation of usage status of the Switching Support System through 30 September 2026 (updated 9 October 2026).
- –The document is provided as a 125KB attachment under 'Notices to business operators' / 'Switching Support System usage status'.
- –The next release is scheduled for 10 November 2026, covering status as of 31 October 2026.
- –The excerpt gives no usage figures; numbers are only in the attached file.
→ Routine OCCTO disclosure of retail switching activity; useful for retailers and PPA offtakers tracking customer churn, with the next data point due 10 November 2026.
2026-10-09OCCTO 広域機関Capacity marketCarbon & GX容量市場事業者へのお知らせ
Capacity Market: Long-Term Decarbonized Power Source Auction (Bidding Year FY2026) Registration and Bidding Schedule
容量市場 長期脱炭素電源オークション（応札年度：2026年度）参加登録・応札等のスケジュールについて
- –OCCTO announces participation registration and bidding schedule for the Long-Term Decarbonized Power Source Auction, bidding year FY2026, via the capacity market system.
- –Business entity registration 13–16 Oct 2026; power source information registration 19–23 Oct 2026; expected capacity registration 9–15 Dec 2026.
- –Bid acceptance 19–26 Jan 2027; expected-capacity calculation basis list registration 27 Jan–3 Feb 2027; schedule may change if unforeseen events occur.
- –Price adjustments for inflation/interest and hydrogen/ammonia/CCS corrected bid prices must be submitted during the bidding period; EGC monitors bid prices afterward.
- –Auction results expected around three months after bidding closes, published in the following fiscal year, subject to monitoring progress.
→ Developers of decarbonized capacity seeking 20-year capacity contracts must complete staged registrations from 13 Oct 2026 and bid by 26 Jan 2027.
2026-10-08OCCTO 広域機関Capacity marketSupply-demand事業者へのお知らせ容量市場
Capacity Market: Briefing Session on Capacity Contribution Payments (Delivery Year FY2027)
容量市場 容量拠出金説明会（対象実需給年度：2027年度）の開催のご案内について
- –OCCTO will hold a web briefing (Webex) on capacity contribution payments for delivery year FY2027 on 21 Oct 2026, 14:30–16:00.
- –Target audience: retail electricity suppliers, general transmission/distribution operators and distribution operators liable for FY2027 contributions.
- –Covers practical procedures in the draft Capacity Market Business Manual (contribution edition, FY2027) and consumption-tax treatment.
- –Public comment on the draft manual is planned to open around 13 Oct 2026; registration deadline is 15 Oct 2026, 15:00.
- –Materials will be posted later; a recording will be published on the capacity market briefing page after the session.
→ Retailers and PPA offtakers should confirm FY2027 capacity contribution procedures and tax treatment early, since these costs feed into supply contract pricing.
2026-10-07OCCTO 広域機関事業者へのお知らせ総会・会員情報管理システム・会費等
Convocation of Extraordinary General Meeting (Scheduled 2 November 2026)
臨時総会の招集について（2026年11月2日開催予定）
- –Extraordinary general meeting on 2 Nov 2026 at 10:30 at OCCTO (Toyosu, Tokyo), streamed via Microsoft Teams with attendance not expected.
- –Resolutions: amendments to Articles of Incorporation, Business Rules, FY2026 business plan, FY2026 budget, and delegation for amendments; report on T&D Business Guideline changes.
- –Questions on agenda items accepted 7 Oct to 26 Oct 2026, 12:00, via the inquiry form.
- –Members must exercise voting rights by 30 Oct 2026, 17:40, via the Member Information Management System; electronic votes override paper votes if duplicated.
→ OCCTO member generators and retailers should vote by 30 October on rule and budget changes that shape grid governance and member obligations.
2026-10-07OCCTO 広域機関情報提供・周知その他
FY2026 Second Meeting of the OCCTO Board of Councillors
2026年度 第2回評議員会
- –Held 6 Oct 2026 from 13:30 at OCCTO as a hybrid (in-person/web) meeting; 12 of 13 councillors attended.
- –Five resolutions: partial amendments to the Articles of Incorporation, Business Rules and Transmission/Distribution Business Guidelines, plus FY2026 business plan and budget changes.
- –Supplementary materials and public-comment results on the rule changes are linked; minutes to be published shortly.
→ Developers and traders should review the proposed changes to OCCTO rules and grid guidelines, which can alter connection and operational obligations.
2026-10-05OCCTO 広域機関事業者へのお知らせ総会・会員情報管理システム・会費等
Handling Expiration of Client Certificates (Expiry Date: October 31, 2026)
クライアント証明書の有効期限切れ対応について（有効期限：2026年10月31日）
→ OCCTO members must renew client certificates before October 31, 2026 to maintain access to member systems used for grid registration, planning submissions and fee management.
2026-10-05OCCTO 広域機関委員会・検討会計画評価・検証小委
Notice of the 17th Meeting of the Plan Evaluation and Verification Subcommittee
第17回 計画評価及び検証小委員会 配布資料
→ OCCTO's review of transmission and supply plans may signal grid reinforcement timelines and interconnection capacity that affect renewable project siting, curtailment risk and PPA deliverability.
2026-10-02OCCTO 広域機関事業者へのお知らせ防災業務等
Implementation of the FY2026 Periodic Report on Emergency Disaster Response (Equipment and Materials Survey)
2026年度緊急災害対応に関する定期報告（資機材調査）の実施について
→ OCCTO's annual survey of grid operators' disaster-response equipment stockpiles signals resilience readiness; developers and offtakers should expect continued emphasis on outage-recovery capability affecting curtailment and supply-reliability risk.
2026-10-01OCCTO 広域機関Renewables事業者へのお知らせ再生可能エネルギー
Approval of Amendments to Rules Concerning Renewable Energy Operations
再エネ業務に関する規程変更の認可について
→ Renewable developers and traders should review OCCTO's revised renewable operations rules, as amended procedures for FIT/FIP settlement, levy or grid coordination may alter compliance obligations.
2026-09-30OCCTO 広域機関Capacity marketSupply-demandCarbon & GX事業者へのお知らせ容量市場
Publication of Capacity Market Manuals on Capacity Outage Plan Adjustment for Delivery Years FY2028 and FY2027
「容量市場業務マニュアル 容量停止計画の調整業務編（実需給年度の2年度前に行う容量停止計画の調整）」 及び 「容量市場業務マニュアル 長期脱炭素電源オークション 実需給期間前から発生するリクワイアメント対応編 (別冊)容量停止計画の調整業務」(対象実需給年度：2028年度、2027年度)の公表について
→ Capacity market participants, including long-term decarbonization auction winners, must align planned outage schedules with OCCTO's two-years-ahead adjustment procedures to avoid requirement breaches and penalties.
2026-09-30OCCTO 広域機関RenewablesSupply-demand情報提供・周知出力抑制に関する検証結果（需給バランス制約）
Publication of Verification Results on Renewable (Variable Output) Curtailment Due to Supply-Demand Balance Constraints in Hokkaido Area (August 2026)
北海道エリアにおける需給バランス制約による再生可能エネルギー発電設備（自然変動電源）の出力抑制に関する検証結果の公表について（2026年8月分）
→ OCCTO's monthly review confirms whether Hokkaido curtailment was justified, giving developers, PPA offtakers and traders data to quantify curtailment risk and price it into Hokkaido projects.
2026-09-30OCCTO 広域機関Capacity marketCarbon & GX事業者へのお知らせ容量市場
Publication of Capacity Market Manual: Long-Term Decarbonized Power Source Auction – Registration, Bidding and Contract Conclusion (FY2026 Bidding)
「容量市場業務マニュアル 長期脱炭素電源オークション 参加登録・応札・容量確保契約書の締結編（応札年度：2026年度）」の公表について
→ Developers of new renewable, storage or other decarbonized capacity should review the FY2026 auction procedures now to prepare participant registration, bid submission and capacity contract requirements.
2026-09-29EGC 電取委Supply-demand制度設計・監視専門会合
24th System Design and Monitoring Meeting: Operation of the Balancing Market (Document 4)
第24回 制度設計・監視専門会合 資料4 需給調整市場の運用等について(PDF形式:4,731KB）
- –Excerpt is empty; title only: Document 4 on operation of the supply-demand adjustment (balancing) market, dated 29 Sep 2026.
→ Balancing market operation reviews can affect imbalance exposure and ancillary-service revenue opportunities for renewable and storage operators; details require the full document.
2026-09-29EGC 電取委制度設計・監視専門会合
24th Meeting on System Design and Monitoring (EGC): Distributed Materials
第24回 制度設計・監視専門会合 制度設計・監視専門会合（第24回）‐配布資料
- –Materials for the 24th System Design and Monitoring Meeting, posted 29 Sep 2026 by the Electricity and Gas Market Surveillance Commission.
- –Document 3: monitoring report on voluntary initiatives and competitive conditions for April–June 2026.
- –Document 4: operation of the balancing (supply-demand adjustment) market.
- –Document 5: revision of generator-side charge unit prices.
→ Traders and generators should check the quarterly competition monitoring and the generator-side charge revision, which affects generator cost pass-through in bilateral contracts.
2026-09-29EGC 電取委制度設計・監視専門会合
24th System Design and Monitoring Meeting: Agenda (Document 1)
第24回 制度設計・監視専門会合 資料1 議事次第（PDF形式:80KB）
- –Meeting held online on 29 Sep 2026 (Reiwa 8), 13:00–14:00.
- –Agenda item 1: monitoring report on voluntary initiatives and competitive conditions (April–June 2026).
- –Agenda item 2: operation of the balancing market; item 3: revision of generator-side charge unit prices.
→ A short agenda signals the key regulatory topics—market competition, balancing market operation and generator-side charges—relevant to renewable generators and traders.
2026-09-29EGC 電取委制度設計・監視専門会合
24th System Design and Monitoring Meeting: Member List (Document 2) and Monitoring Report (Document 3)
第24回 制度設計・監視専門会合 資料2 委員等名簿（PDF形式：142KB）
資料3 自主的取組・競争状態のモニタリング報告（2026年4月～6月期）(PDF形式:8,590KB）
- –Excerpt covers only Document 2, the committee member list; Document 3 content is not included.
- –Chair: Kuninobu Takeda (Osaka University); members include Yumiko Iwafune, Toshihiro Matsumura (University of Tokyo) and Kumiko Muramatsu (PwC Japan).
- –Observers include JEPX, OCCTO, JPEA, Transmission & Distribution Grid Council, ENET, SB Power, Kyushu Electric, J-POWER, ANRE, Consumer Affairs Agency and JFTC.
→ Observer participation by JEPX, JPEA and grid operators shows the forum where renewable and market stakeholders influence monitoring and system design outcomes.
2026-09-29EGC 電取委制度設計・監視専門会合
24th System Design and Monitoring Meeting: Revision of Generator-Side Charge Unit Prices (Document 5)
第24回 制度設計・監視専門会合 資料5 発電側課金の課金単価等の改定について(PDF形式:1,167KB）
- –Generator-side charge (introduced April 2024) unit prices will be revised on 1 Nov 2026 alongside wheeling tariff changes, except Hokuriku; tariffs notified 11 Sep 2026 (Chugoku NW 24 Aug).
- –Revised kW charge (tax included) ranges from ¥81.61/kW·month (Okinawa) to ¥137.50 (Hokkaido); national average ¥103.15/kW·month.
- –Revised kWh charge ranges from ¥0.26/kWh (Kyushu) to ¥0.43 (Hokkaido); national average ¥0.32/kWh. Discounts A-1 to B-2 listed per area.
- –A pass-through survey of generators and retailers adds a question on awareness of the 1 Nov revision; sent late September, collected late October, reported from December.
→ Renewable generators and PPA counterparties should revisit cost pass-through clauses before 1 November 2026, as area-specific kW and kWh charges change.
2026-09-29OCCTO 広域機関事業者へのお知らせ総会・会員情報管理システム・会費等
Temporary Suspension of the Member Information Management System
会員情報管理システムの利用一時停止について
→ OCCTO members should plan around the outage window, as membership registration, information updates and fee-related procedures via the system will be unavailable; no direct market or PPA impact.
2026-09-29OCCTO 広域機関委員会・検討会運用容量検討会
FY2026 4th Operational Capacity Review Meeting: Distributed Materials
2026年度 第4回 運用容量検討会 配布資料
→ Updated inter-regional interconnector operational capacity figures signal transmission headroom, affecting curtailment risk, cross-area PPA deliverability and JEPX area-price spread expectations for developers and traders.
2026-09-29OCCTO 広域機関Capacity marketSupply-demand事業者へのお知らせ容量市場
Capacity Market Practical Briefing on Requirements/Penalties and Capacity Contract Payments (Delivery Year FY2027) – Notice
容量市場 実務説明会（リクワイアメント/ペナルティ・容量確保契約金額対応）（対象実需給年度：2027年度）の開催のご案内について
→ Developers with FY2027 capacity contracts should attend to confirm reliability obligations, penalty exposure and payment procedures, which affect revenue stacking for storage and thermal assets.
2026-09-29OCCTO 広域機関Supply-demand調整力等委委員会・検討会
Notice of the 121st Committee on Balancing Capacity and Supply-Demand Balance Evaluation
第121回 調整力及び需給バランス評価等に関する委員会 議事録
→ Outcomes influence reserve procurement volumes and supply-demand outlooks, affecting balancing costs and spot price expectations for traders.
2026-09-28OCCTO 広域機関Grid & curtailment情報提供・周知系統アクセス・系統利用
Publication of Information on Grid Access Services for Generation Facilities (Applications and Responses, April–June 2026)
発電設備等系統アクセス業務に係る情報公表について（2026年4月～6月の受付・回答分）
→ OCCTO's quarterly disclosure of grid-connection applications and responses lets developers benchmark interconnection timelines, capacity availability and congestion hotspots when siting new renewable projects.
2026-09-28OCCTO 広域機関Grid & curtailment事業者へのお知らせ情報提供・周知
Publication of New Forms Following Revision of the Grid Connection Study Application
接続検討申込書の変更に伴う新様式の公開について
→ Developers must use the updated application form for grid connection studies, so check submission requirements to avoid delays in interconnection queue positioning.
2026-09-28OCCTO 広域機関Grid & curtailment事業者へのお知らせ情報提供・周知
Update to the Grid Access Process Flow for Power Generation Facilities
発電設備等に関する系統アクセスの流れの更新について
→ Renewable developers should review the revised grid access procedure to align project timelines and interconnection planning with OCCTO's updated steps.
2026-09-28OCCTO 広域機関情報提供・周知発電販売計画等・作業停止計画
Designation and Publication of Specified Times in the FY2027 Weekly Plan
2027年度の週間計画における指定時刻の指定及び公表について
→ OCCTO's designated hours for FY2027 weekly plans set when generators and retailers must report supply-demand balances, so developers and traders should align scheduling and outage submissions accordingly.
2026-09-25OCCTO 広域機関Capacity marketCarbon & GX事業者へのお知らせ容量市場
Capacity Market: Practical Briefing on Long-Term Decarbonized Power Source Auction (Registration, Bidding, Capacity Contract) for FY2026 Bids
容量市場 長期脱炭素電源オークション実務説明会（参加登録・応札・容量確保契約書の締結）（応札年度：2026年度）の開催のご案内について
→ Developers planning to bid decarbonized capacity in the FY2026 long-term auction should attend to prepare registration, bidding and contract execution steps for stable 20-year revenue.
2026-09-17OCCTO 広域機関Consultation定款・業務規程・送配電等業務指針事業者へのお知らせ
Call for Comments on Proposed Amendments to Accounting Rules and Accounting/Procurement Detailed Regulations (Sept 17–Oct 8, 2026)
会計規程及び会計・調達業務の細則に関する規程の変更案に対する意見募集について（意見募集期間：2026年9月17日(木)～2026年10月8日(木)）
→ Primarily internal OCCTO governance, but members can comment on how member-funded accounting and procurement are managed; limited direct impact on project economics.
2026-09-16OCCTO 広域機関Grid & curtailment委員会・検討会広域系統整備委
Notice of the 104th Wide-Area Grid Development Committee Meeting
第104回 広域系統整備委員会 開催案内
→ Agenda may advance interregional transmission expansion plans, shaping future grid-connection capacity, curtailment risk and regional price spreads for renewable developers and traders.
2026-09-16OCCTO 広域機関Consultation事業者へのお知らせ予備電源
Results of FY2026 Reserve Power Source Solicitation (for FY2027 and FY2028 Scheme Commencement)
2026年度予備電源募集（2027年度・2028年度制度適用開始向け）の募集結果について
→ Reveals how much retiring thermal capacity is retained as standby reserve, informing supply-adequacy assumptions and scarcity-pricing expectations traders and offtakers model.
2026-09-16OCCTO 広域機関Capacity market事業者へのお知らせ容量市場
Publication of Names of Members in Arrears on Capacity Contributions under Articles 57 and 32-43(3)
定款第57条および業務規程第32条の43第3項の規定に基づき、容量拠出金の滞納を行った会員の名称を公表します
→ Delinquent retailers face public naming; developers and offtakers should screen PPA counterparties for capacity-payment arrears as a credit-risk signal.
2026-09-16OCCTO 広域機関Supply-demand調整力等委委員会・検討会
Notice of the 122nd Committee Meeting on Balancing Capacity and Supply-Demand Balance Assessment
第122回 調整力及び需給バランス評価等に関する委員会 開催案内
→ Deliberations on balancing reserve requirements and supply-demand outlooks influence imbalance costs and market-price expectations for renewable generators and traders.
2026-09-15OCCTO 広域機関Capacity marketCarbon & GX事業者へのお知らせ容量市場
Capacity Market: Update to Long-Term Decarbonized Power Source Auction FAQ
容量市場 長期脱炭素電源オークションFAQの更新について
→ Developers bidding storage, hydrogen or renewables into the long-term decarbonization auction should review clarified eligibility and settlement rules before the next round.
2026-09-15OCCTO 広域機関Consultation情報提供・周知発電販売計画等・作業停止計画
Call for Comments on Proposed Revisions to Finalized Consumption Notification Business Protocol Standards (Sept 15–Oct 5, 2026)
確定使用量通知業務ビジネスプロトコル標準規格（変更案）等に対する意見募集について（意見募集期間：2026年9月15日（火）から2026年10月5日（月））
→ Retailers and PPA offtakers whose billing and settlement systems consume finalized metered-usage data should assess required IT changes and submit comments.
2026-09-14OCCTO 広域機関Capacity market事業者へのお知らせ容量市場
Capacity Market: Publication of Calculation Parameters for July 2026 Capacity Contributions
容量市場 2026年7月分の容量拠出金算定諸元の公表について
→ Retailers can verify July capacity charges; corporate offtakers should expect these costs to be passed through under supply and PPA contracts.
2026-09-11OCCTO 広域機関情報提供・周知発電販売計画等・作業停止計画
Submission and Publication Schedule for FY2027–FY2028 Plans and Days Treated as Holidays
2027・2028年度各種計画に関する提出・公表スケジュールおよび休日相当として扱う日について
→ Generators and retailers must align supply, generation-sales and outage plan submissions with these deadlines to avoid compliance issues and scheduling errors.
2026-09-11OCCTO 広域機関Capacity market容量市場事業者へのお知らせ
Capacity Market: Recalculation and Settlement of Capacity Contributions for April and May 2026
容量市場 容量拠出金（2026年4・5月分）の再算定と精算の実施について
→ Retailers face adjustment invoices or refunds for April–May 2026; offtakers should anticipate corresponding true-ups in capacity-cost pass-through clauses.
2026-09-11OCCTO 広域機関Capacity market事業者へのお知らせ容量市場
Notice of Regional Briefing Sessions on the Capacity Market Overview
容量市場の概要説明会 各地域での開催のご案内について
→ Useful onboarding for new entrants; developers and retailers can clarify how capacity obligations and payments affect their project revenues and supply costs.
2026-09-10OCCTO 広域機関事業者へのお知らせ総会・会員情報管理システム・会費等
Handling of Client Certificate Expiration (Expiry Date: September 30, 2026)
クライアント証明書の有効期限切れ対応について（有効期限：2026年9月30日）
→ OCCTO member companies must renew client certificates before 30 September 2026 to avoid losing access to member information and related systems.
2026-09-10OCCTO 広域機関委員会・検討会グリッドコード検討会
Notice of the 22nd Grid Code Study Group Meeting
第22回 グリッドコード検討会 議事録
→ Evolving grid code requirements, such as inverter performance and ride-through rules, may add compliance costs for new renewable and storage projects.
2026-09-10OCCTO 広域機関Capacity marketSupply-demand事業者へのお知らせ容量市場
Capacity Market Practical Briefing on Capacity Outage Plan Coordination for FY2027–FY2028 Delivery Years (Updated Manual)
容量市場 実務説明会（容量停止計画の調整業務）（対象実需給年度：2028年度、2027年度）の開催案内について（業務マニュアルの更新に伴う説明）
→ Capacity-market resource holders must follow revised outage-coordination procedures to avoid penalties for unavailability during the 2027 and 2028 delivery years.
2026-09-10OCCTO 広域機関事業者へのお知らせスイッチング支援システム利用状況
Usage Status of the Switching Support System (as of August 31)
スイッチング支援システムの利用状況について（8月31日時点）
→ Latest retail switching volumes indicate customer churn and competition intensity, useful for retailers and corporate PPA offtakers assessing supplier options.
2026-09-09OCCTO 広域機関Capacity marketCarbon & GX事業者へのお知らせ容量市場
Capacity Market: Briefing Session on Long-Term Decarbonized Power Source Auction (Bidding Year FY2026)
容量市場 長期脱炭素電源オークション（応札年度：2026年度）制度詳細説明会の開催のご案内について
→ Developers of storage, hydrogen-ready or other decarbonized capacity intending to bid in the FY2026 auction should attend to understand rules and requirements.
2026-09-09OCCTO 広域機関事業者へのお知らせ総会・会員情報管理システム・会費等
Publication of Names of Members in Arrears on Membership Fees under Article 57 of the Articles
定款第57条の規定に基づき、会費の滞納を行った会員の名称を公表します
→ Named members may signal financial distress; PPA counterparties and traders should check the list when assessing counterparty credit risk.
2026-09-09OCCTO 広域機関RenewablesGrid & curtailment情報提供・周知出力抑制に関する検証結果（系統制約）
Verification Results on Renewable Output Curtailment Due to Grid Congestion in Hokkaido Area (July 2026)
北海道エリアにおける流通設備混雑（系統制約）による再生可能エネルギー発電設備（自然変動電源）の出力抑制に関する検証結果の公表について（2026年7月分）
→ Confirms whether July curtailments of variable renewables in Hokkaido were justified; developers should reflect congestion-driven curtailment risk in revenue forecasts and PPA volume terms.
2026-09-09OCCTO 広域機関報告書・取りまとめ年次報告書
Publication of the FY2026 Annual Report
2026年度年次報告書の公表について
→ OCCTO's annual report summarizes grid, supply-demand and market developments, providing background for renewable project planning and trading strategy.
2026-09-09OCCTO 広域機関RenewablesGrid & curtailment情報提供・周知出力抑制に関する検証結果（系統制約）
Verification Results on Renewable Output Curtailment Due to Grid Congestion in Chubu Area (July 2026)
中部エリアにおける流通設備混雑（系統制約）による再生可能エネルギー発電設備（自然変動電源）の出力抑制に関する検証結果の公表について（2026年7月分）
→ Shows congestion-related curtailment of variable renewables in Chubu during July; developers and offtakers should monitor local grid constraints affecting delivered volumes.
2026-09-08OCCTO 広域機関委員会・検討会計画評価・検証小委
Notice of the 16th Plan Evaluation and Verification Subcommittee
第16回 計画評価及び検証小委員会 開催案内
→ Review of supply plans and grid development informs expectations on interconnection capacity and transmission expansion timelines for renewable projects.
2026-09-08OCCTO 広域機関事業者へのお知らせ災害時連携計画
Submission of Revised Disaster Response Cooperation Plan to the Minister of Economy, Trade and Industry
災害時連携計画（変更）の経済産業大臣への送付について
→ Updates utility coordination during disasters; limited direct impact, but generators should note resilience expectations and potential emergency response obligations.
2026-09-08OCCTO 広域機関Supply-demand委員会・検討会需給調整市場小委
Notice of 63rd Balancing Market Subcommittee (Joint with 80th Working Group on Balancing Capacity Segmentation and Wide-Area Procurement)
第63回需給調整市場検討小委員会（第80回 調整力の細分化及び広域調達の技術的検討に関する作業会と合同開催） 開催案内
→ Balancing market design changes may affect imbalance costs and revenue opportunities for aggregators and batteries co-located with renewables.
2026-09-08JEPX 電力取引
Notice on the Renewal of JEPX Trading Systems
取引システムの更改について
- –Spot market: new system running since 1 Apr 2026; legacy system runs in parallel only for deliveries up to 31 Mar 2027.
- –Members must prepare their own system or contract a JEPX link-system provider before the legacy spot system ends.
- –Intraday market: new system live 30 Sep 2026, trading from 1 Oct 2026 delivery; legacy system trades to 30 Sep delivery, stays up until 9 Oct for data retrieval.
- –Settlement statements for new-system trades come only from new settlement management; legacy settlement system abolished 1 Apr 2027 (including non-fossil).
- –Baseload, indirect transmission right and forward trading get new JEPX screens by March 2027 (no API); deposit scheme without system use under study.
→ Traders and PPA balancing parties need API-capable systems or a provider contract for intraday from 1 Oct 2026 and for spot before April 2027.
2026-09-03OCCTO 広域機関Capacity marketSupply-demandCarbon & GXConsultation事業者へのお知らせ容量市場
Public Consultation on Capacity Market Manuals for Planned Outage Coordination (Delivery Years FY2028, FY2027), September 3–16, 2026
容量市場業務マニュアル 「容量停止計画の調整業務編 （実需給年度の2年度前に行う容量停止計画 の調整）」 及び 「容量市場業務マニュアル 長期脱炭素電源オークション 実需給期間前から発生するリクワイアメント対応編 (別冊)容量停止計画の調整業務」(対象実需給年度：2028年度、2027年度)に関する意見募集について（意見募集期間: 2026年9月3日～2026年9月16日）
→ Capacity market participants, including long-term decarbonization auction winners, should review outage coordination rules and submit comments by 16 September 2026.
2026-09-02OCCTO 広域機関Capacity marketCarbon & GXConsultation事業者へのお知らせ容量市場
Call for Comments on Long-Term Decarbonized Power Auction Manual: Registration, Bidding and Contract Execution (FY2026 Bidding)
容量市場業務マニュアル 長期脱炭素電源オークション 参加登録・応札・容量確保契約書の締結編（応札年度：2026年度）に関する意見募集について
→ Storage, hydrogen and biomass developers planning FY2026 bids can influence procedural rules on registration, bidding and contract signing.
2026-09-02OCCTO 広域機関Grid & curtailment委員会・検討会広域系統整備委
Notice of the 103rd Wide-Area Grid Development Committee Meeting
第103回 広域系統整備委員会 録画データ
→ Interregional transmission expansion decisions will shape future curtailment levels and market access for renewables in Hokkaido and Kyushu.
2026-09-02OCCTO 広域機関Capacity market委員会・検討会容量市場検討会
Notice of the 76th Study Group on the Future of the Capacity Market
第76回 容量市場の在り方等に関する検討会 録画データ掲載
→ Agenda items may reshape capacity market design, affecting revenue stacking for solar-plus-storage and retailer capacity cost pass-through.
2026-09-02OCCTO 広域機関Grid & curtailmentConsultation定款・業務規程・送配電等業務指針事業者へのお知らせ
Call for Comments on Proposed Amendments to OCCTO Articles, Business Rules and Grid Operation Guidelines (Sept 2–18, 2026)
定款、業務規程及び送配電等業務指針の変更案に対する意見募集について（意見募集期間：2026年9月2日(水)～2026年9月18日(金)午前中）
→ Developers and traders should review proposed grid-access and wheeling rule changes and submit comments before the September 18 morning deadline.
2026-09-02OCCTO 広域機関Capacity marketCarbon & GXConsultation事業者へのお知らせ容量市場
Publication of FY2026 Long-Term Decarbonized Power Auction Solicitation Guidelines and Capacity Assurance Contract Terms
「容量市場 長期脱炭素電源オークション募集要綱（応札年度：2026年度）」及び「長期脱炭素電源オークション 容量確保契約約款」の公表について
→ Final eligibility, schedule and revenue terms are now fixed, so developers should begin preparing bids for 20-year capacity payments.
2026-09-01OCCTO 広域機関事業者へのお知らせ総会・会員情報管理システム・会費等
Temporary Suspension of the Member Information Management System
会員情報管理システムの利用一時停止について
→ OCCTO members should schedule registration updates around the downtime; no direct market impact.
2026-09-01OCCTO 広域機関情報提供・周知その他
Approval of Appointment of OCCTO Officers
役員の選任の認可について
→ Governance update only; no direct impact on renewable developers or traders.
2026-08-28EGC 電取委制度設計・監視専門会合
23rd Institutional Design and Monitoring Expert Meeting – Distributed Materials
第23回 制度設計・監視専門会合 制度設計・監視専門会合（第23回）‐配布資料
- –EGC webpage listing distributed materials for the 23rd meeting, last updated 28 August 2026.
- –Material 3: operation of the balancing (supply-demand adjustment) market.
- –Material 4: ex-post review of the FY2030 black-start function tender results.
- –Material 5: interconnector capacity reserved for the balancing market.
→ The agenda signals continued regulatory scrutiny of balancing-market operation and interconnector reservation, both relevant to renewable aggregators and traders relying on cross-area capacity.
2026-08-28EGC 電取委制度設計・監視専門会合
23rd Institutional Design and Monitoring Expert Meeting – Material 1: Agenda
第23回 制度設計・監視専門会合 資料1 議事次第（PDF形式:142KB）
- –Meeting held online on Friday 28 August 2026 (Reiwa 8), 15:00–18:00.
- –Agenda item 1: operation of the balancing (supply-demand adjustment) market.
- –Agenda item 2: ex-post review of the FY2030 black-start function tender results.
- –Agenda item 3: interconnector capacity reserved for the balancing market.
→ Developers and traders should monitor the balancing-market and interconnector discussions, as outcomes may affect cross-area reserve procurement and available transmission capacity.
2026-08-28EGC 電取委Supply-demand制度設計・監視専門会合
23rd Institutional Design and Monitoring Expert Meeting – Material 2: Committee Member List
第23回 制度設計・監視専門会合 資料2 委員等名簿（PDF形式：147KB）
資料3 需給調整市場の運用等について(PDF形式:3,527KB）
- –Excerpt covers Material 2 only: list of chair, members, expert members and observers (Material 3 not included).
- –Chair: Kuninobu Takeda, Osaka University; members include Yumiko Iwafune, Toshihiro Matsumura and Kumiko Muramatsu.
- –Observers include Chubu Electric Miraiz, Kyushu Electric, OCCTO, JFTC, JEPX, Ennet, SB Power, J-POWER, TDGC and ANRE officials.
→ Membership shows regulators, JEPX, OCCTO and utilities jointly shaping balancing-market and wholesale rules; stakeholders should track this body for market-design changes.
2026-08-28EGC 電取委制度設計・監視専門会合
Ex-Post Review of FY2030 Black-Start Function Tender Procurement Results
第23回 制度設計・監視専門会合 資料4 2030年度向けブラックスタート機能公募調達結果の事後確認について(PDF形式:2,782KB）
- –Tender opened 8 December 2025, closed 8 June 2026; winners decided 13 July 2026; contract negotiations from 14 July 2026.
- –All bids in all areas were awarded; only Hokkaido saw non-former-utility bidders. Tohoku two systems and Kansai two units unmet.
- –Bid-price method changed: capacity-market expected profit now reflected at bid stage, so nominal prices fell sharply with no real social-cost reduction.
- –Tokyo largest: 3,299 yen/kW and 15.5 billion yen; Hokkaido 49 yen/kW, 0.03 billion yen.
- –Of 37 awarded cases, 6 used pricing approach ① and 31 approach ②; competition expected to remain limited.
→ Black-start procurement remains dominated by former utilities with limited competition, offering little near-term revenue opportunity for renewable or storage developers outside Hokkaido.
2026-08-28EGC 電取委Grid & curtailmentSupply-demand制度設計・監視専門会合
Material 5: Interconnector Capacity Reserved for the Balancing Market
第23回 制度設計・監視専門会合 資料5 需給調整市場向けの連系線確保量について(PDF形式:1,889KB）
- –Title only: document concerns the amount of interconnector capacity secured for the balancing (supply-demand adjustment) market; excerpt unavailable.
→ Interconnector capacity reserved for balancing reduces capacity available for cross-area energy trading, a factor traders and PPA schedulers should watch.
2026-08-26OCCTO 広域機関RenewablesGrid & curtailment情報提供・周知出力抑制に関する検証結果（系統制約）
Verification Results of Renewable Curtailment Due to Transmission Congestion in Chubu Area (June 2026)
中部エリアにおける流通設備混雑（系統制約）による再生可能エネルギー発電設備（自然変動電源）の出力抑制に関する検証結果の公表について（2026年6月分）
→ Chubu developers should check whether congestion-driven curtailments were justified and factor emerging local grid constraints into project siting.
2026-08-26OCCTO 広域機関RenewablesSupply-demand情報提供・周知出力抑制に関する検証結果（需給バランス制約）
Verification Results of Renewable Curtailment Due to Supply-Demand Constraints in Chubu Area (April–June 2026)
中部エリアにおける需給バランス制約による再生可能エネルギー発電設備（自然変動電源）の出力抑制に関する検証結果の公表について（2026年4月～6月分）
→ Confirms spring curtailment levels in Chubu, informing offtakers' expected delivery volumes and developers' revenue models.
2026-08-26OCCTO 広域機関RenewablesSupply-demand情報提供・周知出力抑制に関する検証結果（需給バランス制約）
Verification Results of Renewable Curtailment Due to Supply-Demand Constraints in Kansai Area (April–June 2026)
関西エリアにおける需給バランス制約による再生可能エネルギー発電設備（自然変動電源）の出力抑制に関する検証結果の公表について（2026年4月～6月分）
→ Kansai developers and PPA offtakers can benchmark curtailment losses and validate TSO dispatch order compliance.
2026-08-26OCCTO 広域機関事業者へのお知らせ災害時連携計画
Update of Disaster Response Cooperation Plan Case Studies and Related Materials
災害時連携計画 連携事例集等の更新について
→ Generators and retailers should align emergency coordination procedures with updated examples to meet resilience expectations.
2026-08-26OCCTO 広域機関RenewablesSupply-demand情報提供・周知出力抑制に関する検証結果（需給バランス制約）
Verification Results of Renewable Curtailment Due to Supply-Demand Constraints in Chugoku Area (April–June 2026)
中国エリアにおける需給バランス制約による再生可能エネルギー発電設備（自然変動電源）の出力抑制に関する検証結果の公表について（2026年4月～6月分）
→ Chugoku curtailment results inform PPA delivery-shortfall provisions and highlight value of storage co-location.
2026-08-26OCCTO 広域機関RenewablesSupply-demand情報提供・周知出力抑制に関する検証結果（需給バランス制約）
Verification Results of Renewable Curtailment Due to Supply-Demand Constraints in Kyushu Area (April–June 2026)
九州エリアにおける需給バランス制約による再生可能エネルギー発電設備（自然変動電源）の出力抑制に関する検証結果の公表について（2026年4月～6月分）
→ Kyushu remains the highest-curtailment region; developers and offtakers should stress-test PPA economics against reported spring curtailment rates.
2026-08-26OCCTO 広域機関RenewablesSupply-demand情報提供・周知出力抑制に関する検証結果（需給バランス制約）
Verification Results of Renewable Curtailment Due to Supply-Demand Constraints in Okinawa Area (April–June 2026)
沖縄エリアにおける需給バランス制約による再生可能エネルギー発電設備（自然変動電源）の出力抑制に関する検証結果の公表について（2026年4月～6月分）
→ Okinawa's isolated grid shows curtailment exposure for island solar projects, relevant to local PPA structuring.
2026-08-26OCCTO 広域機関RenewablesSupply-demand情報提供・周知出力抑制に関する検証結果（需給バランス制約）
Verification Results of Renewable Curtailment Due to Supply-Demand Constraints in Shikoku Area (April–June 2026)
四国エリアにおける需給バランス制約による再生可能エネルギー発電設備（自然変動電源）の出力抑制に関する検証結果の公表について（2026年4月～6月分）
→ Shikoku asset owners should review curtailment hours to update revenue forecasts and consider flexibility investments.
2026-08-26OCCTO 広域機関事業者へのお知らせ総会・会員情報管理システム・会費等
Temporary Suspension of the Member Information Management System
会員情報管理システムの利用一時停止について
→ OCCTO members should schedule registration updates around the downtime; no direct market impact.
2026-08-26OCCTO 広域機関RenewablesGrid & curtailment情報提供・周知出力抑制に関する検証結果（系統制約）
Verification Results of Renewable Curtailment Due to Transmission Congestion in Hokkaido Area (June 2026)
北海道エリアにおける流通設備混雑（系統制約）による再生可能エネルギー発電設備（自然変動電源）の出力抑制に関する検証結果の公表について（2026年6月分）
→ Hokkaido asset owners can verify curtailment legitimacy and gauge local congestion risk for PPA volume forecasts.
2026-08-26OCCTO 広域機関RenewablesSupply-demand情報提供・周知出力抑制に関する検証結果（需給バランス制約）
Verification Results of Renewable Curtailment Due to Supply-Demand Constraints in Tohoku Area (April–June 2026)
東北エリアにおける需給バランス制約による再生可能エネルギー発電設備（自然変動電源）の出力抑制に関する検証結果の公表について（2026年4月～6月分）
→ Tohoku solar and wind owners can assess curtailment frequency to refine generation forecasts and PPA volume risk provisions.
2026-08-26OCCTO 広域機関RenewablesSupply-demand情報提供・周知出力抑制に関する検証結果（需給バランス制約）
Verification Results of Renewable Curtailment Due to Supply-Demand Constraints in Hokuriku Area (April–June 2026)
北陸エリアにおける需給バランス制約による再生可能エネルギー発電設備（自然変動電源）の出力抑制に関する検証結果の公表について（2026年4月～6月分）
→ Hokuriku curtailment data helps developers quantify spring oversupply risk and traders anticipate near-zero daytime spot prices.
2026-08-25OCCTO 広域機関事業者へのお知らせ供給計画
On Securing Additional Supply Capacity for FY2027
2027年度のさらなる供給力確保について
→ Signals anticipated supply tightness in FY2027, creating opportunities for storage and flexible assets while raising price-volatility risk for traders.
2026-08-24OCCTO 広域機関Renewables事業者へのお知らせ再生可能エネルギー
Publication of Results of the 29th Solar Power Auction (FY2026)
2026年度入札実施要綱（陸上風力発電・着床式洋上風力発電）の制定について
→ Clearing prices and awarded capacity provide a fresh benchmark for corporate PPA pricing and project return assumptions.
2026-08-21JEPX 電力取引Market rules
Cancellation of the First FY2026 Baseload Market Auction
2026年度第1回ベースロード取引の中止について
- –JEPX cancels the first FY2026 baseload market auction.
- –Decision follows discussion at the 2nd Power Business Environment Working Group (28 Jul 2026), agenda item 3 on emissions trading treatment in wholesale transactions.
- –Contact: JEPX secretariat (Kunimatsu).
→ Retailers and offtakers planning baseload hedges lose the first FY2026 auction; emissions-trading treatment is now a live risk for wholesale product design.
2026-08-20OCCTO 広域機関委員会・検討会計画評価・検証小委
Notice of the 15th Plan Evaluation and Verification Subcommittee Meeting
第15回 計画評価及び検証小委員会 配布資料
→ The subcommittee reviews supply-demand and grid plan performance; developers should watch findings that may reshape interconnection and generation plan assumptions.
2026-08-19OCCTO 広域機関Capacity market事業者へのお知らせ容量市場
Publication of Member Names in Arrears on Capacity Contribution Payments Under Articles and Business Rules
定款第57条および業務規程第32条の43第3項の規定に基づき、容量拠出金の滞納を行った会員の名称を公表します
→ Named retailers pose counterparty credit risk; PPA offtakers and traders should reassess exposure to these entities.
2026-08-19OCCTO 広域機関Consultation事業者へのお知らせ予備電源
[Closed] Call for Comments on Draft Reserve Power Source Guidelines and Contract Terms (FY2027–2028 Start)
＜募集終了＞予備電源募集要綱（2027年度・2028年度制度適用開始向け）（案）及び予備電源契約約款（案）に関する意見募集について（意見募集期間：2026年7月15日(水)～2026年7月28日(火)）
→ Comment period has ended; owners of mothballed thermal units should await final guidelines defining reserve power eligibility and compensation.
2026-08-17OCCTO 広域機関Capacity market事業者へのお知らせ容量市場
Capacity Market: Publication of Capacity Contribution Fee Calculation Parameters for June 2026
容量市場 2026年6月分の容量拠出金算定諸元の公表について
→ Retailers and PPA offtakers can verify the capacity levy embedded in June 2026 costs, clarifying a key non-energy component of delivered power prices.
2026-08-12OCCTO 広域機関事業者へのお知らせ総会・会員情報管理システム・会費等
Temporary Suspension of the Member Information Management System
会員情報管理システムの利用一時停止について
→ OCCTO members should schedule membership data updates around the outage; no direct effect on market prices or trading.
2026-08-12OCCTO 広域機関事業者へのお知らせ総会・会員情報管理システム・会費等
Handling of Client Certificate Expiration (Expiry Date: August 31, 2026)
クライアント証明書の有効期限切れ対応について（有効期限：2026年8月31日）
→ Participants must renew OCCTO system client certificates before August 31, 2026 or risk losing access for plan submissions and market operations.
2026-08-12OCCTO 広域機関事業者へのお知らせスイッチング支援システム利用状況
Usage Status of the Switching Support System (as of July 31)
スイッチング支援システムの利用状況について（7月31日時点）
→ Switching volumes indicate retail competition intensity, helping PPA offtakers and retailers gauge customer churn and market entry conditions.
2026-08-12OCCTO 広域機関情報提供・周知発電販売計画等・作業停止計画
Update to the Guidelines for Preparing Plan Submissions
計画に関する記載要領の更新
→ Generators and traders must follow the revised format for generation, sales and outage plans to avoid rejected submissions and imbalance exposure.
2026-08-12OCCTO 広域機関発電販売計画等・作業停止計画情報提供・周知
Schedule for OCCTO System Usage Applications During the FY2026 Silver Week Holiday Period
2026年度シルバーウィーク期間中の広域機関システム利用申請のスケジュールについて
→ Participants needing system access or applications should submit early ahead of the September holidays to avoid processing delays.
2026-08-07OCCTO 広域機関Capacity marketCarbon & GX事業者へのお知らせ容量市場
Capacity Market: Publication of Decarbonization Roadmaps for FY2025 Long-Term Decarbonized Power Source Auction
容量市場 長期脱炭素電源オークション（応札年度：2025年度）脱炭素化ロードマップの公表について
→ Roadmaps reveal how awarded thermal, hydrogen and ammonia units plan to decarbonize, signaling the long-term firm-capacity landscape renewables will compete against.
2026-08-07OCCTO 広域機関RenewablesConsultation再生可能エネルギー事業者へのお知らせ
[Closed] Public Comment on Proposed Amendments to Renewable Energy Business Rules (August 7–28, 2026)
＜募集終了＞再エネ関連業務規程の変更案に対する意見募集について（意見募集期間：2026年8月7日（金）～2026年8月28日（金））
→ Amendments to OCCTO renewable-related rules are advancing; FIT/FIP developers should review the finalized changes for procedural or operational impacts.
2026-08-06OCCTO 広域機関Capacity marketMarket rulesSupply-demand事業者へのお知らせ容量市場
Capacity Market: Publication of Supplementary Auction Results for Delivery Year FY2027
容量市場追加オークション約定結果（対象実需給年度：2027年度）の公表について
→ Clearing results shape FY2027 capacity levy expectations for retailers and PPA offtakers and confirm revenue for cleared capacity providers.
2026-08-03OCCTO 広域機関事業者へのお知らせ総会・会員情報管理システム・会費等
Temporary Suspension of the Member Information Management System
会員情報管理システムの利用一時停止について
→ OCCTO members should plan membership data changes around the downtime; no market pricing implications.
2026-07-31EGC 電取委制度設計・監視専門会合
22nd System Design and Monitoring Meeting, Document 4: Monitoring Report on Voluntary Initiatives and Competition (Jan–Mar 2026)
第22回 制度設計・監視専門会合 資料4 自主的取組・競争状態のモニタリング報告（2026年1月～3月期） (PDF形式:8,083KB）
- –Title only: EGC secretariat report monitoring voluntary initiatives and competitive conditions in the power market for the January–March 2026 quarter (excerpt empty).
→ Quarterly competition monitoring shapes EGC scrutiny of incumbents' wholesale market behaviour, affecting liquidity and pricing conditions that renewable sellers and PPA offtakers rely on.
2026-07-31EGC 電取委制度設計・監視専門会合
Material 2: Member List; Material 3: Draft Evaluation of Non-Discriminatory Wholesale by Former Utilities and JERA
第22回 制度設計・監視専門会合 資料2 委員等名簿（PDF形式：145KB）
資料3 現時点における旧一般電気事業者及びJERAの内外無差別な卸売の評価結果（案）等について (PDF形式:4,218KB）
- –Title only: Material 2 is the committee member list; Material 3 presents draft evaluation results of non-discriminatory (internal/external) wholesale by former general electricity utilities and JERA; excerpt unavailable.
→ Evaluation of non-discriminatory wholesale affects whether independent retailers and PPA offtakers can access former-utility and JERA supply on equal terms.
2026-07-31EGC 電取委Supply-demand制度設計・監視専門会合
22nd System Design and Monitoring Meeting, Document 5: Operation of the Balancing Market
第22回 制度設計・監視専門会合 資料5 需給調整市場の運用等について（PDF形式：2,868KB）
- –Covers tertiary② and composite balancing markets, 1 April–10 July 2026; April–May final, June–July preliminary figures from EPRX data.
- –June tertiary② average price fell in all areas except Hokkaido and Kyushu; Tokyo dropped from ¥11.85 to ¥3.75, expected cost ¥1,681m to ¥670m.
- –Composite market price cap changed to ¥15/ΔkW·30min from 14 March deliveries; exceedances checked and settled at the cap.
- –Primary reserve remains under-procured in many areas; Hokkaido and Shikoku among areas meeting requirements.
- –Pumped-storage bilateral contracts started: Tohoku/Chubu 1 April, Kansai 4 April, Tokyo 26 May, Chugoku 10 June, reducing composite procurement volumes.
→ Falling balancing prices and pumped-storage bilateral deals shrink reserve market revenue, relevant to battery and flexible renewable operators planning balancing-market participation.
2026-07-31EGC 電取委Grid & curtailment制度設計・監視専門会合
22nd System Design and Monitoring Meeting, Document 8: Recurrence Prevention for TSO Non-public Information Leaks
第22回 制度設計・監視専門会合 資料8 一般送配電事業者による非公開情報の情報漏えいに係る再発防止策の検討 （PDF形式：1,722KB）
- –Reports scoring of Hokkaido Electric Network and Hokkaido Electric after a roughly one-year intensive improvement period following their information-leak case.
- –Scoring uses COSO-based criteria: 107 items for TSOs, 79 for retailers, three-level scores averaged over five components on a 30-point scale.
- –Shared-folder management criteria were added following the Hokkaido case.
- –Separate hearings of 19 other TSOs and group companies were compiled; future policy direction also reported.
→ Stronger information firewalls between TSOs and group retailers aim to protect competitive confidentiality for independent renewable developers and PPA suppliers.
2026-07-31EGC 電取委制度設計・監視専門会合
22nd System Design and Monitoring Meeting, Document 7: Survey on Generator-Side Wheeling Charges
第22回 制度設計・監視専門会合 資料7 発電側課金のアンケート等について（PDF形式：1,967KB）
- –Generator-side charge introduced April 2024; annual survey checks whether bilateral contracts pass it through per the pass-through guideline.
- –Last year's results were reported at the 18th meeting on 20 February 2026; today confirms this year's survey method.
- –New item added on whether generator-side charge discounts influence plant siting; municipalities with waste-to-energy plants added to respondents.
- –Respondents reporting non-pass-through or disputes will receive individual hearings; TSO procedure improvement requests continue to be tracked.
→ Renewable generators and PPA offtakers should expect continued regulator scrutiny of how generator-side charges are passed through in bilateral contract pricing.
2026-07-31EGC 電取委Storage制度設計・監視専門会合
22nd System Design and Monitoring Meeting, Document 6: Ex-post Review Results of FY2025 Pumped-Storage Bilateral Contracts
第22回 制度設計・監視専門会合 資料6 2025年度揚水随意契約の事後確認結果について（PDF形式：1,389KB）
- –FY2025 pumped-storage bilateral contracts ran in five areas: Chubu, Tohoku, Kansai, Hokkaido and Tokyo, all ending 31 March 2026.
- –Contracted capacities: Chubu up to 610MW, Tohoku 230MW, Kansai 470MW, Hokkaido 340MW, Tokyo up to 600MW.
- –Procurement unit prices (¥/ΔkW·h): Chubu 0.69, Tohoku 1.34, Kansai 0.63, Hokkaido 4.46, Tokyo 0.78, all below revenue-cap application prices.
- –Secretariat found no problems in contract validity, pricing or ex-post settlement for any area.
→ Cheap pumped-storage bilateral reserves lower TSO balancing costs but displace market-procured flexibility, limiting revenue upside for batteries and flexible renewable assets.
2026-07-31EGC 電取委制度設計・監視専門会合
22nd Institutional Design and Monitoring Expert Meeting – Material 1: Agenda
第22回 制度設計・監視専門会合 資料1 議事次第（PDF形式:137KB）
- –Title only: agenda for the 22nd meeting dated 31 July 2026; excerpt unavailable.
→ The agenda indicates the regulator's July 2026 priorities; market participants should check items relevant to wholesale sourcing.
2026-07-31EGC 電取委制度設計・監視専門会合
22nd Institutional Design and Monitoring Expert Meeting – Distributed Materials
第22回 制度設計・監視専門会合 制度設計・監視専門会合（第22回）‐配布資料
- –Title only: EGC webpage listing distributed materials for the 22nd meeting dated 31 July 2026; excerpt unavailable.
→ Stakeholders should review the 22nd meeting materials for regulatory developments affecting wholesale market conduct and procurement.
2026-07-31OCCTO 広域機関Supply-demand需給調整市場小委委員会・検討会
Materials for 62nd Balancing Market Subcommittee (Joint with 79th Working Group on Reserve Segmentation and Wide-Area Procurement)
第62回 需給調整市場検討小委員会 録画データ
→ Balancing market design changes affect imbalance costs for renewable generators and revenue opportunities for batteries and aggregators providing reserves.
2026-07-30OCCTO 広域機関Capacity marketSupply-demand事業者へのお知らせ容量市場
Capacity Market: Publication of FY2026 Main Auction Demand Curve (Delivery Year FY2030)
容量市場 2026年度メインオークション需要曲線（対象実需給年度：2030年度）の公表について
→ The demand curve bounds likely clearing prices, letting bidders set strategies and offtakers estimate FY2030 capacity levy exposure.
2026-07-30OCCTO 広域機関Capacity marketSupply-demand事業者へのお知らせ容量市場
Capacity Market: Schedule for FY2026 Main Auction Registration and Bidding (Delivery Year FY2030)
容量市場 2026年度メインオークション（対象実需給年度：2030年度）参加登録・応札等のスケジュールについて
→ Fixed deadlines mean storage and dispatchable renewable developers must register promptly to secure FY2030 capacity revenue.
2026-07-30OCCTO 広域機関Capacity marketSupply-demand事業者へのお知らせ容量市場
Capacity Market: Publication of OCCTO-Designated Forms for Participation Registration, Delivery Year FY2030
2030年度実需給向け 容量市場 参加登録時の提出書類（当機関指定様式）の公表について
→ Resource owners intending to bid in the FY2030 auction must prepare documentation using these forms to complete registration on time.
2026-07-30OCCTO 広域機関Capacity marketSupply-demand事業者へのお知らせ容量市場
Capacity Market: Operations Manual on Main Auction Registration, Bidding and Capacity Contract Execution (Delivery Year FY2030)
容量市場 業務マニュアル メインオークションの参加登録・応札・容量確保契約書の締結編（対象実需給年度：2030年度）の公表について
→ The manual details obligations from bidding through contract signing, helping bidders assess penalties and compliance burdens before committing capacity.