The Japan Electric Power Exchange (JEPX) spot market is the core platform for wholesale electricity trading in Japan. This guide covers market structure, bidding mechanisms, regional price spreads, and practical operations.
The Japan Electric Power Exchange (JEPX), established in 2003, is Japan's only wholesale electricity exchange. The spot market is its highest-volume segment, conducting daily competitive auctions for next-day electricity delivery.
[KEY DATA]
The JEPX spot market processes approximately 120 million kWh per day, representing 30–40% of Japan's total electricity consumption.
The JEPX spot market operates as a Day-Ahead Market. Bids are accepted from 10:00 AM daily for the following day's electricity. At 1:00 PM, a uniform price auction determines the System Price for each 30-minute delivery slot.
Japan's power grid is divided into nine regions: Hokkaido, Tohoku, Tokyo, Chubu, Hokuriku, Kansai, Chugoku, Shikoku, and Kyushu. Regional prices (Area Prices) can diverge from the System Price when transmission capacity constraints (interconnection congestion) occur.
JEPX uses a Uniform Price Auction: all successful bidders pay the same Market Clearing Price, regardless of their individual bid prices. This design promotes market efficiency and fairness.
"Understanding JEPX's price formation mechanism is the essential first step for anyone entering Japan's electricity trading market."
This article references the following official publications and public data:
免責聲明 / Disclaimer： Blog articles are for educational and reference purposes only and do not constitute investment advice.
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