電源開発株式会社は主に発電事業に従事しています。同社は 4 つの事業セグメントで事業を展開しています。 the electricity segment engages in power generation business including hydroelectric power generation, thermal power generation and wind power generation, as well as provision of electricity. the electricity-related segment engages in design, installation, maintenance and repair of electrical power equipment, the port operation of fuel and coal ash, the coal mine development, the import of coal, the procurement and manufacture of biomass fuel, the operation of public health facilities, as well as the provision of computer services. the overseas operation segment is in the operation of electrical power generation investment business and other related businesses, engineering and consulting businesses in overseas.その他のセグメントは、新電力事業、環境関連事業等を行う。