- Business
- eREX Co., Ltd. engages in the electric power business, primarily through power retailing, power generation, fuel procurement and trading. The company operates biomass power plants including Tosa, Saiki, Buzen, Ofunato and Nakagusuku facilities in Japan; procures biomass fuel from overseas sources such as Indonesia and Malaysia for its plants and third-party sales; conducts electricity trading leveraging market expertise; and retails electricity nationwide via subsidiaries Evergreen Marketing Co., Ltd., Evergreen Retailing Co., Ltd., Okinawa Gas New Power Co. and e-sell Co., Ltd., serving high-voltage, extra-high-voltage and low-voltage customers excluding remote islands. Founded in 1999 and headquartered at 14F Kyobashi Edogrand, 2-2-1 Kyobashi, Chuo-ku, Tokyo, Japan, eREX maintains operations across Japan with international fuel sourcing and development activities in Southeast Asia including Vietnam and Singapore through subsidiaries like erex Singapore Pte. Ltd. Recent developments include a November 2025 EPC contract signing for the Yen Bai Biomass Power Plant in Vietnam following collaboration on the Hau Giang plant that commenced operations in April 2025; an October 2025 MOU with Samsung C&T Japan Office for joint battery energy storage system development starting with a 2MW/8MWh pilot in Miyazaki Prefecture and plans for larger projects; a December 2024 capital and business alliance with JR East completed in January 2025 involving a 2 billion yen investment for 4.9% ownership to support renewable aggregation and decarbonization; and expansion into renewable asset aggregation including sleeving a JR East off-site PPA in June 2025 plus a first grid-scale storage battery investment decision in September 2025.