News
Grid-scale battery storage news from Japan that does not yet name MW, MWh and a company, so it is not in the project registry. Open a story for the full account in English and Japanese.
- 2026-09-29エキサイト
TAOKE ENERGY enters primary balancing market with two more projects held by SPC "PP6 GK"
TAOKE ENERGY announced that two grid-scale battery storage sites developed through its SPC PP6 GK, in Kakamigahara (Gifu) and Oyama (Tochigi), entered Japan's primary balancing market in September 2026. The projects are part of its battery-storage fund business using external capital, with subsidiary POWER POOL acting as aggregator.
- operating
- 岐阜県各務原市、栃木県小山市
- 4 MW
- TAOKE ENERGY
- PP6合同会社
- POWER POOL
Attached to:栃木県小山市東野田2ＭＷ蓄電所 → - 2026-09-29エキサイト
TAOKE ENERGY enters primary balancing market with two projects of SPC "PP6 LLC"
TAOKE ENERGY announced that two grid-scale battery sites developed through its SPC PP6 LLC entered Japan's primary balancing (一次調整力) market in September 2026. The high-voltage sites are in Kakamigahara, Gifu and Oyama, Tochigi, operated via a battery-fund scheme using external capital, with subsidiary POWER POOL as aggregator.
- operating
- 岐阜県各務原市、栃木県小山市
- 4 MW
- TAOKE ENERGY株式会社
- PP6合同会社
- POWER POOL
Attached to:岐阜県各務原市那加大門町2MW蓄電所 → - 2026-09-27PR TIMES
What is the "second life" battery business? Webinar to explore the potential of EV battery reuse
Japan Branding Co., Japan general agent for GUS Technology batteries, will hold a free online webinar in mid-October 2026 on second-life use of EV/HEV batteries in grid-scale storage. Topics include the remaining life of HEV batteries, expected growth in recovered batteries, four technical challenges, and Sumitomo Corporation's reuse-battery grid storage project in Chitose, Hokkaido.
- ジャパンブランディング株式会社
- GUS Technology（格斯科技）
- 住友商事
- ウエストホールディングス株式会社
Attached to:住友商事の北海道千歳市プロジェクト → - 2026-09-24ニュースイッチ
109 MWh capacity: ENEOS Power to build grid-scale battery storage station in Shizuoka
ENEOS Power will build a 50 MW / 109 MWh grid-scale battery storage station on idle land at the ENEOS Shimizu oil terminal in Shizuoka City, the first extra-high-voltage grid storage station in Japan's 60 Hz western area. Construction starts in January 2027 with operation planned within FY2028, and Daiwa Energy will handle EPC using lithium-ion batteries.
- planned
- 静岡県静岡市清水区
- 50 MW
- 109 MWh
- ENEOSパワー
- ENEOS清水油槽所
- 大和エネルギー
- 大和ハウス工業
Attached to:ENEOS Power 清水油槽所系統用蓄電所（仮称） → - 2026-09-22住宅新報
Ando Hazama and Sustech: First Grid-Scale Battery Storage Station Begins Operation
Ando Hazama has begun full operation of the Tochigi-shi Iwafune-machi battery station in Tochigi Prefecture, the first project in its grid-scale battery business. The station is rated at 1,990 kW with 8,170 kWh of capacity. Sustech acts as aggregator, using its ELIC platform to trade in the wholesale, balancing and capacity markets.
- operating
- 栃木県栃木市岩舟町
- 2 MW
- 8.2 MWh
- 安藤ハザマ
- Sustech
Attached to:岩舟町蓄電所 → - 2026-09-19環境ビジネスオンライン
Grid-scale storage plant doubles biddable balancing capacity through "nega-posi operation" – Hirasol Energy
Hirasol Energy announced on September 16 that its Izumizaki Village grid-scale storage plant in Nishishirakawa District, Fukushima Prefecture, passed pre-qualification for "nega-posi" operation in the balancing market. Against a rated output of 1,900kW, it was approved for a biddable capacity of 3,800kW, twice its rated output, by providing balancing power both by curtailing charging and by discharging.
- operating
- 福島県西白河郡泉崎村
- 1.9 MW
- ヒラソル・エナジー
- 2026-09-18infoseek.co.jp
"Electricity can't be stored" is a thing of the past: webinar to explain the "three roles" of grid-scale batteries
Japan Branding Co., Japan's sole distributor of GUS Technology batteries, will hold a free online webinar in early October 2026 on the three roles of grid-scale batteries: frequency stabilisation, absorbing surplus renewables, and securing supply capacity. The press release notes that only about 840,000 kW of grid batteries were connected as of end-March 2026, against about 35 million kW of connection applications.
- ジャパンブランディング株式会社
- GUS Technology（格斯科技）
- ウエストホールディングス株式会社
Attached to:豊前蓄電池変電所 → - 2026-09-18PR TIMES
[Nippon Chikudenchi Co., Ltd.] Agreement concluded on power supply from grid-scale batteries during disasters
Nippon Chikudenchi Co., Ltd., which has installed a grid-scale battery storage station in Masuda City, signed a disaster power-supply agreement with the city on 16 September 2026. In emergencies, a qualified electrical chief engineer can operate external outlets at the station to supply stored power for charging portable batteries, phones and laptops. The company says its planned station of about 8 MWh (8,146 kWh) could supply about 470 households for 72 hours.
- planned
- 島根県益田市
- 8.1 MWh
- 日本蓄電池株式会社
- 益田市
- 2026-09-17時事通信
"Electricity can't be stored" is a thing of the past: webinar to explain the "three roles" of grid-scale batteries
Japan Branding Co., Japan's exclusive distributor for GUS Technology batteries, will hold a free online webinar in early October 2026 on the three roles of grid-scale batteries: frequency stabilization, absorbing surplus renewables, and securing supply capacity. The press release notes that about 840,000 kW of grid batteries were connected as of end-March 2026, against about 35 million kW of connection applications.
- ジャパンブランディング株式会社
- GUS Technology（格斯科技）
- ウエストホールディングス株式会社
Attached to:豊前蓄電池変電所 → - 2026-09-17PR
Grid-scale battery station now capable of "nega-posi operation": supplying 3,800kW of balancing capacity, twice its rated output
Hirasol Energy announced that its Izumizaki Village grid-scale battery station in Nishishirakawa District, Fukushima, passed pre-qualification for "nega-posi" operation in the balancing market. The 1,900kW station was approved for 3,800kW of offerable capacity across four balancing products, with combined bidding also permitted. The company achieved this using its in-house J-EMS platform and self-made edge devices.
- operating
- 福島県西白河郡泉崎村
- 1.9 MW
- ヒラソル・エナジー株式会社
- ヒラソル電設株式会社
Attached to:泉崎村系統用蓄電所 → - 2026-09-15東京都宅建協会
ADW accelerates investment in grid-scale battery storage stations
A.D.Works is accelerating investment in grid-scale battery storage stations as part of diversifying its asset business, raising its FY2026 site acquisition target from 10 to 15 and aiming to complete and operate all 15 facilities by end-2028. Its first station in Matsusaka, Mie began operating in June 2026, and a second in Mashiki, Kumamoto was completed in August.
- operating (Matsusaka), completed (Mashiki), others planned
- 三重県松阪市、熊本県益城町
- エー・ディー・ワークス
Attached to:ADW三重松阪市蓄電所 → - 2026-09-14週刊不動産経営
ADWorks Group launches crowdfunding service "REALE", building new "pillars" toward ¥20 billion pre-tax profit in 2034
ADWorks Group held a press briefing on its newly launched real estate crowdfunding service REALE and its grid-scale battery storage business. Its first storage site in Matsusaka, Mie began operating in March and its second in Mashiki, Kumamoto in August. The company has acquired 9 projects and targets 8 in operation by end of FY2027 and 15 by end of 2028.
- operating
- 三重県松阪市; 熊本県益城町
- ADワークスグループ
Attached to:ADW熊本益城町蓄電所 →
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