JEPX spot prices for 2026-10-23 by area (daily average): Hokkaido ¥16.51/kWh, Tohoku ¥24.28/kWh, Tokyo ¥29.01/kWh, Chubu ¥30.36/kWh, Hokuriku ¥26.78/kWh, Kansai ¥26.78/kWh, Chugoku ¥18.69/kWh, Shikoku ¥10.93/kWh, Kyushu ¥18.38/kWh; system ¥25.34/kWh, midday ¥15.09/kWh, evening ¥35.28/kWh.
Related: price volatility and area spreads · interconnector flows and congestion · balancing market (EPRX) prices
- System
- ¥25.34/kWh
- Hokkaido
- ¥16.51/kWh
- Tohoku
- ¥24.28/kWh
- Tokyo
- ¥29.01/kWh
- Chubu
- ¥30.36/kWh
- Hokuriku
- ¥26.78/kWh
- Kansai
- ¥26.78/kWh
- Chugoku
- ¥18.69/kWh
- Shikoku
- ¥10.93/kWh
- Kyushu
- ¥18.38/kWh
Day-ahead spot · intraday · history
JEPX Spot Price Today
Delivery date
48-slot curve · 2026-10-23
All areas selectable · dashed = trailing 7-day average per slot
- Kyushu (九州)
- System (システム)
- Tokyo (東京)
- Volume (MWh)
Area spotlight card · Kyushu (九州) · 2026-10-23
One area, one delivery day: price curve vs system & Tokyo, split/floor hours, solar & wind capture, curtailment · follows the date picker above
JEPX Pulse · Area Spotlight Kyushu 九州
Day-ahead delivery Fri, 23 Oct 2026 · rank #7 of 9 areas
jepx-pulse.com
JEPX スポット市場 · 九州エリア需給実績 (TSO)
Kyushu averaged ¥18.38/kWh (+1.37 d/d), #7 of 9 areas, -10.63 vs Tokyo — decoupled from the system price in 24.0 h
TSO supply-demand data for 2026-10-23 not yet published — renewables figures are from 2026-10-20, the latest complete TSO day — 0.0 floor hours, midday/day ratio 0.61; 30 days to 2026-10-20: solar capture rate 50%, curtailment 3.12%
Shape: peak ¥39.00 at 16:00, trough ¥10.63 at 10:00 — evening − midday spread ¥16.62/kWh; 30-day avg ¥14.03, split share 97%, floor 46.0 h
48-slot day-ahead price · ¥/kWhKyushuSystemTokyo¥0.01 floor
Area avg
18.38¥/kWh
+1.37 d/d · 30d avg 14.03
vs Tokyo
-10.63¥/kWh
vs system -6.95 · 30d -11.54
Split hours
24.0h
≠ system · 30d share 97%
Floor hours
0.0h
¥0.01 slots · 30d 46.0 h
Peak / trough
39.0 / 10.6
16:00 / 10:00
Midday / day
0.61
mid 11.2 · eve 27.8 (+16.6)
Renewables · TSO 需給実績 · 2026-10-20 (latest TSO day; card date 2026-10-23)
30d: solar capture 50% · wind 91% · curtailment 3.12%
Solar capture · 40,611 MWh
12.98¥/kWh
65% of 2026-10-20 baseload
Wind capture · 1,046 MWh
21.85¥/kWh
110% of 2026-10-20 baseload
Curtailed (出力制御)
0MWh
0.00% of VRE · solar 0 / wind 0
Midday VRE share
49%
solar peak 5,972 MW · RE 29%
Sources: JEPX スポット市場 (day-ahead, 48 slots) · 九州 TSO エリア需給実績 (solar/wind output & 出力制御) · Capture rate = generation-weighted ÷ time-weighted price · For information only, not investment adviceGenerated 2026-10-22 20:04 UTC
Why did the price peak? · outages, congestion, reserve margin
Rule-based chips for the day's highest half-hour in the selected area (slot 34) — details on the Scarcity page
Why? · Tokyo (東京) 2026-10-23 slot 34 · DA ¥37.67563 MW unplanned out · 3 unit(s) on forced outage that dayRule-based: coincides with, not causal proof.
Intraday (時間前) market · nationwide · same delivery date
Nationwide weighted average and high/low per slot vs day-ahead system price · bars = traded volume (MWh per half-hour)
- Day-ahead system
- High
- Intraday avg
- Intraday vol
- Low
Intraday (時間前) vs day-ahead spread
Intraday weighted average − day-ahead price · 2025-10-22 → 2026-10-23 (367 days) · positive = intraday cleared above spot
System · exact (public nationwide intraday)
mean0.93 ¥/kWhP10 / P50 / P90-2.06 / 0.51 / 4.05σ · |mean|3.58 · 2.05above / below ref.63% / 36%
Tokyo (東京) day-ahead basis · exact — area DA − system DA
mean2.68 ¥/kWhP10 / P50 / P900.00 / 1.44 / 7.51σ · |mean|3.84 · 2.87above / below ref.86% / 7%
Method & caveat
Window spans the 1 Oct 2026 series break — use the pre / post toggle to compare periods
Area figures = the national intraday spread applied to the area's day-ahead schedule: nationwide intraday weighted average + (area day-ahead − system day-ahead), floored at ¥0.01. JEPX publishes no area-level intraday prices; this is a derived series, not an observation, and it cannot show intraday splits between areas. Since 1 October 2026 intraday trading is API-only with order books in five area groups — the public summary stays national, so 1 Oct is treated as a series break (periods are never averaged together).Liquidity: 23.8 GWh/day traded intraday (366 complete days, 1 incomplete day excluded) · thin slots (bottom 20% volume): 00:00, 00:30, 01:00, 01:30, 02:00, 02:30…
48-slot spread profile · mean with P10–P90 band · bars = intraday volume (MWh)
- Intraday volume
- P10
- P90
- System exact
- Tokyo (東京) est.
Monthly spread · mean and P10–P90
- Mean
- P10
- P90
By time-of-day block
| Block | Mean | P10 | P90 | Above DA |
|---|---|---|---|---|
| night 00-06 | 0.51 | -2.37 | 2.81 | 58% |
| morning 06-10 | 1.02 | -1.77 | 3.91 | 64% |
| midday 10-14 | 1.98 | -0.51 | 5.27 | 82% |
| afternoon 14-17 | 1.77 | -1.36 | 5.54 | 73% |
| evening 17-21 | 0.43 | -2.87 | 3.45 | 52% |
| late 21-24 | 0.06 | -2.64 | 2.27 | 55% |
Typical 4h-BESS realisation ratio by area (estimate)
HKD 88%THK 89%TKO 84%CBU 84%HRK 86%KNS 86%CGK 83%SKK 79%KYS 85%
Spread heatmap · last 60 days × 48 slots · red = intraday above DA, cyan = below
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Imbalance (インバランス) price vs day-ahead
Official 30-min area imbalance prices (OCCTO publication) · 2025-10-22 → 2026-10-23 (367 days) · shortage = cost of being short, surplus = value of being long
Imbalance price cap ¥300/kWh since 2026-10-01 (¥200 before)¥300-regime stress (rule-based, 補正料金算定インデックス × C=¥300/D=¥50): 192 of 525 補正 half-hours lifted → expected cost 1.881 ¥/kWh error (+2.2%) · rule detail →Window spans the 1 Oct 2026 series break — use the pre / post toggle to compare periods
Mean imbalance price
15.56¥/kWh
day-ahead 17.13 · single price 100% of slots
Mean adverse spread |IMB − DA|
4.60¥/kWh
worst-direction settlement vs day-ahead
Expected cost / MWh error
1,839¥
adverse share 70% · 1.84 ¥/kWh
Spike slots
2.4%
imbalance ≥ 2× DA and ≥ ¥5 above
IMB above / below DA
38 / 62%
short hurts / long hurts
Max imbalance price
200.00¥/kWh
2026-07-22 16:30
48-slot profile · day-ahead vs imbalance price · bars = mean adverse spread · dots = P90 cost when short
- Adverse spread ¥
- Day-ahead
- Imbalance (shortage)
- P90 cost if short
Monthly · mean imbalance vs DA · spike share
- Adverse spread
- Day-ahead
- Imbalance
- Spike slots %
All areas · settlement risk (365d)
| Area | DA | IMB | |IMB−DA| | Midday | Evening | Spike | ¥/MWh err |
|---|---|---|---|---|---|---|---|
| ■ Hokkaido | 13.70 | 14.16 | 5.54 | 4.48 | 7.05 | 9.2% | 2,217 |
| ■ Tohoku | 14.28 | 13.50 | 3.82 | 3.86 | 5.31 | 4.2% | 1,526 |
| ■ Tokyo | 17.13 | 15.56 | 4.60 | 5.97 | 6.25 | 2.4% | 1,839 |
| ■ Chubu | 16.11 | 14.05 | 4.76 | 5.21 | 7.02 | 2.1% | 1,904 |
| ■ Hokuriku | 13.82 | 13.30 | 4.57 | 5.50 | 6.06 | 3.9% | 1,830 |
| ■ Kansai | 13.51 | 12.84 | 4.33 | 5.04 | 5.92 | 3.0% | 1,732 |
| ■ Chugoku | 12.45 | 11.91 | 4.05 | 4.60 | 5.69 | 3.4% | 1,620 |
| ■ Shikoku | 10.04 | 10.22 | 3.78 | 3.90 | 5.30 | 7.0% | 1,511 |
| ■ Kyushu | 11.56 | 11.15 | 3.88 | 3.49 | 5.86 | 3.7% | 1,551 |
Method
Imbalance prices are the official 30-minute area 余剰/不足インバランス料金単価 published by the nine general transmission and distribution companies on their joint site (インバランス料金情報公表ウェブサイト, imbalanceprices-cs.jp). Short positions settle at the shortage price, long positions at the surplus price. Per slot, the adverse spread is the direction that hurts (shortage − day-ahead when short, day-ahead − surplus when long) and the favourable spread the direction that helps. Expected cost per kWh of forecast error = adverse share × adverse spread + (1 − adverse share) × favourable spread; renewable forecast errors are correlated with system imbalance, so the default adverse share is 70%. FIP generators also receive the METI バランシングコスト allowance, which depends on the delivery and FIP-start fiscal years (FY2026 ¥1.70–2.00/kWh).Cost-if-short heatmap · Tokyo (東京) · last 60 days × 48 slots · red = imbalance above DA, cyan = below
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Daily average price history
Time-weighted daily averages by area · pick a start date to reach 2016
- Hokkaido (北海道)
- Kyushu (九州)
- System (システム)
- Tokyo (東京)
Price heatmap · days × 48 slots
Purple = ¥0.01 floor · cyan low · amber mid · red spike
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