Data on Japan's power and infrastructure markets
Starting with grid-scale battery storage: every project we can find, with its developer, grid area, capacity and sources. Data centres, JEPX prices, FIP/FIT and simulation tools are being added.
Datasets and tools
Grid-scale battery projects with developers, grid area, capacity, COD and sources.
In developmentData centresデータセンターData centre projects in Japan, with location, capacity and power supply.
In developmentJEPX power markets日本卸電力取引所Spot and intraday prices from the Japan Electric Power Exchange, by area.
In developmentPPA & tolling電力購入契約・トーリングOfftake agreements for storage and renewables in Japan: PPAs, tolling and capacity contracts, with counterparties, terms and sources.
In developmentFIP / FIT固定価格買取・フィードインプレミアムCertified renewable projects and tariff data under the FIT and FIP schemes.
In developmentBESS simulation蓄電所シミュレーションModel battery revenue and dispatch against market prices.
Latest news
- 2026-10-21財経新聞
eREX's second grid-scale battery project begins commercial operation, targeting 100MW of managed capacity by 2028 (Chiba Sanbu-gun storage station)
eREX announced on October 20 that its second grid-scale battery project, the Chiba Sanbu-gun storage station in Shibayama, Chiba, has started commercial operation, with 1,989.6kW output and 8,147kWh capacity using LFP batteries. The company acts as an aggregator handling operation and control, and aims for 100MW of managed capacity across its business by 2028.
- operating
- 千葉県山武郡芝山町
- 2 MW
- 8.1 MWh
- イーレックス
Attached to:千葉県山武郡蓄電所 → - 2026-10-21テレ東BIZ
Erex opens storage plant in Chiba to complement renewables
Power retailer and generator Erex began operating a grid-scale battery storage plant in Chiba Prefecture on the 20th. Such facilities store surplus electricity and supply it during shortages, helping offset the intermittency of renewables. Erex plans to also develop facilities combining solar generation with batteries.
- operating
- 千葉県
- イーレックス
- 2026-10-20環境ビジネスオンライン
Solar developer Sanwa System brings its first grid-scale battery online, targets 30MW by 2027
Sanwa System, a solar-focused subsidiary of trading company Takashima, announced on October 14 that its first contracted grid-scale battery project began operating in September, after the company entered the business in January 2026. It has five more projects on order and aims for 30MW by 2027 and over 100MW in the medium to long term. The article is paywalled, so only its opening portion is available.
- operating
- サンワシステム
- デジタルグリッド
- 高島
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