On March 1, 2025, Goi United Generation commissioned the 780MW Unit 3 at Goi Thermal Power Station in Ichihara City, Chiba Prefecture, the company’s owners JERA, ENEOS Power, and Kyushu Electric Power announced. With that, all three of the 2.34GW power plant’s units are operable.
According to the statement, the combined cycle gas turbine was commissioned about a month ahead of its originally planned March 31, 2025, COD. Like with the first two units, Toshiba Energy Systems & Solutions and Toshiba Plant Systems & Services were responsible for engineering, procurement, and construction (EPC). The former was in charge of civil engineering, plant design, equipment supply, and construction. The latter was in charge of equipment installation.
The power plant was built to replace the approximately 1.9GW, six-unit original Goi Power Plant owned by TEPCO, which was decommissioned at the end of FY2017. After the repowering project was transferred from TEPCO Fuel & Power to JERA, its joint venture with Chubu Electric Power, the company partnered with JXTG Energy, now ENEOS. Unit 1 was commissioned on August 1, 2024, and Unit 2 on November 14, 2024.
JERA’s wholly-owned subsidiary JERA Power Investment owns 60% of Goi United Generation. ENEOS owns 33.33% and Kyushu Electric Power’s Kyuden Energy Investment owns 6.67%.
As Japan continues its transition away from coal and oil, its utilities are ramping up the development of LNG-fired units. Among other such projects, at the end of last year, JERA partnered with Toho Gas to jointly develop two new 660MW units at the Chita Thermal Power Station.
