JERA and ENEOS Power will jointly develop the LNG-fired Sodegaura Thermal Power Station’s new Units 1 and 2 in Sodegaura City, Chiba Prefecture, the companies announced on November 6, 2026.
According to the statement, each unit will be an approximately 870MW combined cycle gas turbine (CCGT) with an efficiency of about 64%. They are expected to begin commercial operation in 2032 and 2033, respectively. The utility’s thermal power plant investment unit JERA Power Investment will hold a 66% stake in the project joint venture that the companies plan to establish within FY2026, with ENEOS Power owning the remaining 34%.
The new Units 1 and 2, alongside a third, same-scale one that is targeted to come online in 2041 and is not part of the joint venture, will replace the power plant’s original four units. JERA retired the 600MW Unit 1 in September 2025 and plans to phase out Units 4 and 3 in FY2027 and FY2028. The existing Unit 2 is scheduled to be taken out of service in FY2032.
OCCTO data shows the new Units 1 and 2 were awarded capacity contracts in the FY2025 long-term decarbonization auction. JERA launched the environmental impact assessment process for the repowering project in November 2025 and filed the methodology in July 2026.
ENEOS Power previously partnered with JERA on the 2.34GW Goi Thermal Power Station in Ichihara City, Chiba Prefecture. It holds a 33.33% stake in the project alongside JERA Power Investment’s 60% and Kyushu Electric Power unit Kyuden Energy Investment’s 6.67%.
