Tokyo Gas signed 20-year tolling agreements for two grid-scale BESS projects with a combined power capacity of 80MW, bringing its total to 110MW across three sites, the company announced on June 30, 2025. Both assets are expected to be commissioned in FY2027.
According to the statement, the smaller of the two projects is the 30MW Ishikari Power Storage Station in Ishikari City, Hokkaido, owned by Renova-affiliated special purpose company (SPC) R3 Chikudensho LLC. The larger, 50MW/201MWh Ashiya Power Storage Station in Ashiya Town, Fukuoka Prefecture, is owned by Ashiya Battery Power LLC, an SPC linked to Singapore-based Equis Development.
Previously, Tokyo Gas signed a tolling agreement with Eku Energy for the 30MW/120MWh Hirohara Energy Storage Plant currently under construction in Miyazaki Prefecture.
Separately from the tolling agreements, Tokyo Gas will also optimize trading of three additional assets, including its wholly-owned subsidiary Nijio’s 25MW/50MWh project in Oita Prefecture and Renova’s 90MW Tomakomai Power Storage Station and 75MW Morimachi Mutsumi Power Storage Station in Hokkaido and Shizuoka Prefecture, respectively.
To date, Tokyo Gas is the only known company in Japan to have signed tolling agreements as an offtaker. The scheme’s role in large-scale BESS project bankability in Japan is likely to grow with the recent exclusion of sub-six-hour storage assets from the government’s long-term decarbonization auction.
