eREX Co., Ltd. engages in the electric power business. It operates through the following business divisions: Power Retail, Power Generation, and Fuel. The Power Retail division supplies power to retailers for private institutions as well as households. The Power Generation division handles power generation through biomass. The Fuel division manages the procurement of biomass fuel from local suppliers in Indonesia and Malaysia. The company was founded on December 8, 1999 and is headquartered in Tokyo, Japan.