Tokyo Gas launched grid-scale battery storage trading optimization service, the company said on March 6, 2025. It secured Renova as the launch customer, signing a contract for two of its upcoming power storage stations totaling 165MW.
As part of the service, Tokyo Gas will prepare charging and discharging plans based on its market price forecasts, and control batteries and trade in the wholesale, balancing, and capacity markets on its customers’ behalf. According to the company’s statement, it plans to use the know-how acquired as a power retailer, its in-house software, and Kraken, a platform developed by its strategic partner Octopus Energy, to deliver the service.
The 20-year contract with Renova is expected to come into effect in FY2028, the planned commissioning year of the 90MW Tomakomai Power Storage Station in Tomakomai City, Hokkaido Prefecture, and the 75MW Morimachi Mutsumi Power Storage Station in Mori Town, Shizuoka Prefecture. It signed the agreement as part of the two companies’ broader renewables-focused partnership from last April, which also saw Tokyo Gas acquire a minority stake in the developer.
Renova was awarded capacity contracts for both of the assets in Japan’s first long-term decarbonization auction. It recently secured financing for the project from MUFG Bank among others.
Tokyo Gas first announced its entry into the grid-scale storage business in April 2024. Its wholly-owned subsidiary Nijio is building a 25MW/50MWh asset, subsidized by METI’s FY2023 program for promoting energy storage, in Oita Prefecture. In FY2024, Tokyo Gas was awarded the subsidy covering a portion of development and construction costs for a project in Hokkaido.
Separately, the company also signed a 20-year tolling agreement for the 30MW/120MWh Hirohara Power Storage Station being developed by Eku Energy in Miyazaki Prefecture.
