JAPAN ELECTRICITY MARKET INTELLIGENCE

Deep Intelligence on Japan's Electricity Market

From JEPX spot prices to regulatory frameworks — the most authoritative market insights for energy trading professionals.

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Hokkaido14.4%Tohoku13.6%Tokyo32.1%Chubu29.9%Hokuriku23.3%Kansai16.9%Chugoku16.4%Shikoku58.8%Kyushu16.2%Okinawa46.3%Hokkaido14.4%Tohoku13.6%Tokyo32.1%Chubu29.9%Hokuriku23.3%Kansai16.9%Chugoku16.4%Shikoku58.8%Kyushu16.2%Okinawa46.3%
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EPRX Public Comment on Ancillary Services Market Trading Rules Revision: Scheduled for July 2026 Implementation· EPRX

May 11, 2026

Deep Dive Series

Post-PPA Era Series: 4 In-Depth Analyses

Tracking Japan's electricity market structural transformation after JERA PPA termination — from market shock and restructuring to TOCOM futures liquidity and Q2 quarterly validation

Series Feature

BESS × EPRX Complete Revenue Roadmap

From bidding rules to financial modeling — 5 in-depth articles on Japan BESS revenue strategy

Recent Posts

Latest Articles

TOCOM Power Futures Settlement Prices — Week of May 15, 2026
Data Insights

TOCOM Power Futures Settlement Prices — Week of May 15, 2026

Analysis of Japan power futures settlement prices for May 15, 2026 based on TOCOM data. East Area July baseload settled at 21.63 JPY/kWh, with peakload reaching 28.16 JPY/kWh, reflecting a significant summer premium.

8min
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EPRX Public Comment on Ancillary Services Market Trading Rules Revision: Scheduled for July 2026 Implementation
Policy & Regulation

EPRX Public Comment on Ancillary Services Market Trading Rules Revision: Scheduled for July 2026 Implementation

EPRX has announced a public comment period for proposed revisions to its Ancillary Services Market trading rules, slated for implementation in July 2026. These revisions aim to enhance market efficiency and transparency, aligning with recent developments in the day-ahead market. Electricity traders and BESS operators should closely monitor these changes to adapt to the evolving market landscape.

8min
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Japan's Capacity Contribution Charge, Refund Deduction, and Consumer Impact: A Complete Guide
Policy & Regulation

Japan's Capacity Contribution Charge, Refund Deduction, and Consumer Impact: A Complete Guide

A systematic guide to Japan's capacity market financial mechanism: capacity contribution charge calculation, the fundamental difference between main auction and LTDA refund deduction, retailer allocation, and practical consumer impact with response strategies.

12min
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LTDA Revenue Calculation Explained — Fixed Income, Market Revenue, and the Refund Obligation
Beginner Guide

LTDA Revenue Calculation Explained — Fixed Income, Market Revenue, and the Refund Obligation

A comprehensive breakdown of LTDA revenue mechanics: 100% retention of fixed capacity payments, the three-tier refund structure (95%/90%/85%), Business Return Amount calculation, and the full scope of operator rights and obligations — with a worked numerical example.

12min
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Australia NEM Price Volatility and Extreme Weather Impacts: Quarterly Data Analysis 2024–2026
Market Analysis

Australia NEM Price Volatility and Extreme Weather Impacts: Quarterly Data Analysis 2024–2026

AEMO's Quarterly Energy Dynamics (QED) reports reveal that NEM-wide negative price frequency surged from 12.3% in Q1 2024 to an all-time record of 31.0% in Q4 2025, with South Australia reaching 48.4%. This analysis examines nine quarters of data to unpack the compounding effects of solar penetration, rising BESS price-setting power, and extreme weather events.

10min
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European BESS Commercial Models & Contract Structures: A Deep Dive into the UK and German Markets
Trading Strategy

European BESS Commercial Models & Contract Structures: A Deep Dive into the UK and German Markets

From tolling agreements to revenue floor-plus-share structures, European BESS contract frameworks are rapidly evolving. This article provides a deep dive into the rise of UK Balancing Mechanism revenues, Germany's structural transition from ancillary services to wholesale arbitrage, and the financing logic and negotiation points of the four main Flexibility Purchase Agreement (FPA) structures.

15min
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Chubu Area Structural Price Spike in April 2026: The JERA Whale Effect and JPX Chubu Futures Listing
Market Analysis

Chubu Area Structural Price Spike in April 2026: The JERA Whale Effect and JPX Chubu Futures Listing

In April 2026, JEPX spot prices in the Tokyo and Chubu regions surged sharply, with Chubu reaching a peak of ¥44.70/kWh. This article analyzes the "whale effect" following the termination of JERA's group-internal PPA, the behavioral shift of TEPCO EP and Chubu Electric Miraiz in market procurement, and the market significance of the JPX Chubu electricity futures listing on April 13.

12min
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December 2025 Hokkaido Price Anomaly: Earthquake, Interconnector Outage and Cascade Effects
Market Analysis

December 2025 Hokkaido Price Anomaly: Earthquake, Interconnector Outage and Cascade Effects

On the night of December 8, 2025, an M6.6 earthquake off the coast of Aomori triggered the shutdown of the Hokuhon interconnector and emergency trip of the Tomato-Atsuma power plant. Hokkaido electricity market became instantly isolated, with JEPX spot prices surging from a normal ¥12/kWh to ¥50/kWh. Using 384 half-hourly data points, this article reconstructs the complete cascade event timeline.

12min
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Australia vs Japan Electricity Derivatives Market: Bridging a 25-Year Development Gap
Market Analysis

Australia vs Japan Electricity Derivatives Market: Bridging a 25-Year Development Gap

Australia's ASX electricity futures market trades ~42 TWh annually versus Japan's TOCOM at ~4.5 TWh—a 9x gap. This article compares the structural differences in liquidity, Cap futures mechanisms, regulatory frameworks, and foreign access, analyzing how Japan can leverage Australia's 25-year market development journey to accelerate its own derivatives market.

13min
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