# Green Battery Inc. > Green Battery Inc. (株式会社Green Battery) is a Tokyo-based company that develops, builds, operates and sells grid-scale battery energy storage systems (BESS) in Japan. It captures surplus solar and wind power that would otherwise be curtailed and supplies it to the grid when demand peaks. This is the English website. The Japanese website is https://greenbattery.co.jp/. ## Key facts - Legal name: Green Battery Inc. (株式会社Green Battery) - Business: development, construction, operation and sale of grid-scale battery storage; energy solutions - Representative: Kotaro Okada, Representative Director & CEO - Leadership: Yoshihiro Kano, Ph.D. (Director); Yusuke Kato, USCPA (Chief Financial Officer) - Head office: 7F, ICON PLACE SHIBAKOEN, 3-2-18 Shiba, Minato-ku, Tokyo 105-0014, Japan - Branches: Tohoku Branch (Sendai, Miyagi); Kyushu Branch (Hakata, Fukuoka) - Capital: JPY 129,000,000 (including capital reserve) - Employees: about 50 - Membership: Battery Business Association (general member) - Pipeline (as of September 2026): 396 grid-interconnection applications (28 extra-high-voltage, 368 high-voltage) across four regional grids: Tohoku, Tokyo (Kanto), Chugoku and Kyushu - Target: 4 GWh of grid-scale battery storage in Japan - Contact: info@greenbattery.co.jp or https://greenbatteryjapan.com/contact ## Why grid-scale storage matters in Japan - Japan relies on imports for about 99% of its primary energy. - Around 8.5 TWh of clean electricity is curtailed in Japan each year because the grid cannot absorb it when it is generated. - Solar output peaks at midday while demand peaks in the evening. Batteries charge on surplus renewable power and discharge at the evening peak. ## Pages - [Home](https://greenbatteryjapan.com/): overview, how grid-scale storage works, FAQ - [Services](https://greenbatteryjapan.com/services): site acquisition, EPC and operations, grid interconnection and permitting including the Long-Term Decarbonization Auction (LTDA), sale of grid-connection-ready projects - [Projects & pipeline](https://greenbatteryjapan.com/projects): regional footprint, development stages, representative sites - [Safety & community](https://greenbatteryjapan.com/safety): battery management, fire detection and suppression, fire-department coordination, setbacks, noise, community engagement - [About](https://greenbatteryjapan.com/about): vision, purpose and mission - [Company profile](https://greenbatteryjapan.com/company): corporate data and office addresses - [Members](https://greenbatteryjapan.com/members): leadership team biographies - [Careers](https://greenbatteryjapan.com/careers): hiring areas and how to apply - [News](https://greenbatteryjapan.com/news): press releases, exhibitions and media - [Contact](https://greenbatteryjapan.com/contact): inquiries from landowners, partners, investors, media and job seekers ## News - [Newsroom](https://greenbatteryjapan.com/news): all press releases, newest first - 2026-09-15: [Thank You for Visiting Our Booth at SMART ENERGY WEEK [Autumn] 2026](https://greenbatteryjapan.com/news/thank-you-smart-energy-week-autumn-2026) - 2026-09-09: [[Currently Exhibiting] Exhibiting at SMART ENERGY WEEK](https://greenbatteryjapan.com/news/exhibiting-at-smart-energy-week-autumn-2026) - 2026-08-14: [Notice of Appointment of Mr. Tadachiyo Osada, Former Representative Director and Senior Managing Director of MUFG Bank, as Outside Director](https://greenbatteryjapan.com/news/appointment-of-outside-director) - 2026-07-01: [Notice: Commencement of TV Commercial Broadcast on “Mezamashi TV”](https://greenbatteryjapan.com/news/tv-commercial-mezamashi-tv) - 2026-07-01: [Notice: Membership in the Battery Business Association (BBA)](https://greenbatteryjapan.com/news/membership-battery-business-association) - 2026-05-20: [Notice Regarding Completion of Power Generation Business Registration](https://greenbatteryjapan.com/news/power-generation-business-registration) - 2026-04-23: [Green Battery to Exhibit at “Kyushu Innovation Week — GX Decarbonization Promotion EXPO”](https://greenbatteryjapan.com/news/exhibit-kyushu-innovation-week-gx-expo) - 2026-04-17: [Notice of Office Relocation](https://greenbatteryjapan.com/news/notice-of-office-relocation-2026) - 2026-04-16: [Green Battery Goes on Air: Masters Golf Tournament 2026 CM Broadcast!](https://greenbatteryjapan.com/news/masters-golf-tournament-2026-tv-commercial) - 2026-04-07: [Building the Future of Energy: Green Battery Launches Grid Storage Project in Yamanashi](https://greenbatteryjapan.com/news/yamanashi-grid-storage-project-construction) - 2026-03-27: [Thank You for Visiting Us at Sustainable Management WEEK!](https://greenbatteryjapan.com/news/thank-you-sustainable-management-week-2026) - 2026-03-16: [Green Battery Powers Up: Now an Official Partner of the Fukuoka SoftBank Hawks!](https://greenbatteryjapan.com/news/official-partner-fukuoka-softbank-hawks) - 2026-03-03: [Green Battery Featured in Industry Publication “PVeye” — March 2026 Issue](https://greenbatteryjapan.com/news/featured-in-pveye-march-2026) - 2026-01-25: [Green Battery to Launch TV Commercial on KKT’s 『くりぃむしちゅーの熊本どぎゃん！？』](https://greenbatteryjapan.com/news/tv-commercial-kkt-kumamoto) - 2026-01-07: [Green Battery to Exhibit at the 8th Sustainable Management WEEK, March 17, 2026](https://greenbatteryjapan.com/news/exhibit-8th-sustainable-management-week) - 2025-12-13: [Green Battery Announces Sponsorship of “Shimizu Golf Club” YouTube Channel](https://greenbatteryjapan.com/news/sponsorship-of-shimizu-golf-club-youtube-channel) - 2025-12-08: [Green Battery Launches New TV Commercial in the Kyushu Region](https://greenbatteryjapan.com/news/new-tv-commercial-kyushu-region) - 2025-10-30: [Thank You for Visiting Us at Smart Energy Week Autumn](https://greenbatteryjapan.com/news/thank-you-smart-energy-week-autumn-2025) - 2025-10-30: [RE+ 2025 Visit in Las Vegas](https://greenbatteryjapan.com/news/re-2025-visit-in-las-vegas) - 2025-06-22: [Green Battery to Exhibit at “SMART ENERGY WEEK Autumn 2025”](https://greenbatteryjapan.com/news/exhibit-smart-energy-week-autumn-2025) - 2025-04-09: [Website Renewal Announcement](https://greenbatteryjapan.com/news/website-renewal-announcement) - 2025-04-09: [Notice of Head Office Relocation (New Office: Shiba, Minato-ku)](https://greenbatteryjapan.com/news/head-office-relocation-shiba-minato-ku) ## Insights (blog) - [Insights index](https://greenbatteryjapan.com/blog/): all Green Battery explainers, newest first - [What is grid-scale battery storage? A plain guide for Japan](https://greenbatteryjapan.com/blog/what-is-grid-scale-battery-storage): A grid-scale battery is a large battery connected directly to the power grid. It charges when power is plentiful and discharges when the grid needs it. (published 2026-09-15) ## Optional - [Privacy policy](https://greenbatteryjapan.com/privacy)