A total of 37 projects were awarded 36.3 billion yen in subsidies under METI’s FY2025 program for supporting the introduction of energy storage, the scheme’s operator Sustainable Open Innovation Initiative (SII) announced on December 25, 2025. While both grid-scale battery storage and electrolysis projects were eligible to apply, all awards were for the former.
Overall, 11 projects were awarded more than 1 billion yen, seven were awarded between 200 million yen and 1 billion yen, and 19 were awarded less than 200 million yen. Orix was awarded the highest total amount, 7.5 billion yen across two projects in Yamagata and Oita prefectures. Mitsubishi Estate, Itochu, and Tokyo Century were jointly awarded the maximum possible 4 billion yen for an extra high-voltage facility in Fukuoka Prefecture.
Eight Kyushu projects were allocated 27% of the overall amount (9.8 billion yen) and five facilities to be built in Chubu accounted for 20% of the total (7.4 billion yen). At 10 projects, Chugoku was the TSO area with the most awards. Hokuriku was the only mainland region with no selected projects. It is unclear whether any from the region applied.
Several of the recipients have not disclosed grid-scale battery projects in the past. Printing and real estate company Kowabo is the most notable one, having been awarded about 3 billion yen jointly with Mitsubishi HC Capital for a project in Shizuoka Prefecture and 1.6 billion yen individually for a project in Aichi Prefecture.
For projects using lithium-ion and other established technologies, the subsidy covers up to 50% of eligible costs with a 4 billion yen cap if the facility is 10MW or larger and up to a third with a 1 billion yen cap if it is smaller than 10MW.
Recipients of METI’s FY2025 Subsidy for Grid-Scale BESS Projects
- Hokkaido TSO area
- Juken (171,300,665 yen)
- Higashi-Kushiro Chikudensho (3,824,696,500 yen)
- Mitsuuroko Green Energy (908,546,500 yen)
- Tohoku TSO area
- IBeeT and Tokyu Land in Miyagi Prefecture (1,128,544,328 yen)
- ORIX in Yamagata Prefecture (3,995,282,803 yen)
- RS Technologies in Fukushima Prefecture (381,727,566 yen)
- Tokyo TSO area
- Banpu Japan in Tochigi Prefecture (2,703,690,528 yen)
- Farmdo in Saitama Prefecture (156,434,703 yen)
- Chubu TSO area
- Koto Kosan in Nagano Prefecture (188,946,161 yen)
- Toko Electrical Construction in Gifu Prefecture (152,216,666 yen)
- Mitsubishi HC Capital and Kowabo in Shizuoka Prefecture (2,980,889,664 yen)
- ENEOS Power in Shizuoka Prefecture (2,546,402,319 yen)
- Kowabo in Aichi Prefecture (1,563,575,085 yen)
- Kansai TSO area
- Orient Microwave in Shiga Prefecture (188,090,676 yen)
- Koto Kosan in Shiga Prefecture (188,011,568 yen)
- Mori Trust in Shiga Prefecture (323,007,136 yen)
- Kurihalant in Hyogo Prefecture (470,176,869 yen)
- Sumitomo Mitsui Finance & Leasing and Miki Kogyo in Hyogo Prefecture (253,396,515 yen)
- Chugoku TSO area
- RYODEN and JPN ENERGY Integrated System in Tottori Prefecture (224,305,613 yen)
- Ichibata Jusetsu in Shimane Prefecture (171,300,665 yen)
- Sanei Sangyo in Okayama Prefecture (148,151,932 yen)
- Keytoss in Okayama Prefecture (212,009,562 yen)
- Japan Energy Holdings in Okayama Prefecture (150,681,424 yen)
- Chugoku Electric Power, Chudenko, and ML Power in Yamaguchi Prefecture (2,654,678,106 yen)
- Sanyo Shizen Energy in Yamaguchi Prefecture (171,300,665 yen)
- T Corporation in Yamaguchi Prefecture (170,927,332 yen)
- Miyamoto Kenzai in Yamaguchi Prefecture (171,533,998 yen)
- ES Giken in Yamaguchi Prefecture (137,250,000 yen)
- Shikoku TSO area
- Sankyo Engineering in Ehime Prefecture (171,533,998 yen)
- Kyushu TSO area
- Sugiken in Fukuoka Prefecture (154,359,999 yen)
- Sugiken in Fukuoka Prefecture (160,860,000 yen)
- Sunshine Kitakyushu Hombu in Fukuoka Prefecture (171,753,333 yen)
- Sunshine Kitakyushu Hombu in Fukuoka Prefecture (118,763,666 yen)
- Mitsubishi Estate, Itochu, and Tokyo Century in Fukuoka Prefecture (4,000,000,000 yen)
- Cosmo Energy Holdings in Nagasaki Prefecture (133,269,015 yen)
- Kamigumi in Oita Prefecture (1,525,771,100 yen)
- ORIX in Oita Prefecture (3,543,575,358 yen)
