NTT Anode Energy commissioned three grid-scale battery storage facilities in Saitama Prefecture between January and May 2025, it announced on May 23, 2025.
According to the statement, the smallest, 1.1MW/5.3MWh Saitama Wako Power Storage Station in Wako City began commercial operations in January. It was followed by 2MW/10MWh assets in Miyoshi Town and Tsurugashima City in April and May, respectively. All three facilities will be aggregated by NTT Anode Energy and traded in the wholesale, balancing, and capacity markets.
Saitama Miyoshi Power Storage Station and Saitama Tsurugashima Power Storage Station were awarded about 614 million yen and 620 million yen, respectively, through Tokyo Government’s FY2023 subsidy for large-scale energy storage projects.
In addition to the three projects, NTT Anode Energy recently commissioned a 2MW/9MWh project in Gunma Prefecture jointly with TEPCO Holdings. Outside the Tokyo TSO area, it operates the 2MW/8MWh Fukuoka Wakamatsu Power Storage Station and the 1.4MW/4.2MWh Tagawa Power Storage Station, also in Fukuoka, which it built together with Kyushu Electric Power and Mitsubishi Corporation.
The company has about 340MWh of BESS in its pipeline, including the six operational in Kanto and Kyushu, five additional high-voltage projects (40MWh) set for commissioning later this fiscal year, 10 high-voltage projects (90MWh) scheduled to come online in FY2026, and two extra high-voltage projects (160MWh) with FY2028 COD targets.
In addition to developing its own projects, it also plans to launch a turnkey BESS construction and operation service in July 2025.
Correction (June 9, 2025): The previous version of this article incorrectly indicated that subsidy for two of the projects was provided by METI.
