Data on Japan's power and infrastructure markets
Grid-scale battery storage projects, half-hourly JEPX prices by area, and every renewable facility certified under FIT and FIP. Each dataset links back to its source. Data centres, PPAs 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.
LiveJEPX power markets日本卸電力取引所Spot, intraday, FIP reference and imbalance 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.
LiveFIP / FIT固定価格買取・フィードインプレミアムEvery renewable facility certified under the FIT and FIP schemes, with operators, capacity and location (METI register).
In developmentBESS simulation蓄電所シミュレーションModel battery revenue and dispatch against market prices.
JEPX day-ahead · 22 Oct 2026
FIT / FIP certified facilities
389,736 facilities and 109,241 MW certified under the FIT and FIP schemes, from METI's public register (as of 2026-09-30). Updated weekly.
By technology
- Solar58,306 MW383,316 facilities
- Wind20,449 MW3,619 facilities
- Biomass15,018 MW1,172 facilities
- Other12,385 MW15 facilities
- Hydro2,872 MW1,511 facilities
- Geothermal211 MW103 facilities
Certified capacity by year
MW by year of first certification, facilities still listed.Source: METI 事業計画認定情報 公表用ウェブサイト (fit-portal.go.jp). The register does not say whether a facility is under FIT or FIP.
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
Recently updated projects
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