Electric Power Development Co., Ltd. engages in the wholesale supply of hydroelectric and thermal power in Japan.

The company operates through Electric Power Business, Overseas Business, Electric Power-Related Business, and Other Business segments.

It also produces wood fuel and other biomass fuels; and generates and transmits electricity.

In addition, the company invests in, imports, transports, and sells coal; sells fly ash; procures forest offcut; produces and sells fertilizers; offers activated coke; operates welfare, wood pellet manufacturing, and nuclear power plants; operates and maintains telecommunication facilities and waste-fueled power generation plants; and constructs and maintains electronic and communication facilities.

Further, it engages in the ocean transportation of coal for thermal power plants; research, planning, and analysis of environmental conservation; surveying and compensation for construction sites; provision of investment management, and research and development of projects; facility maintenance and business process outsourcing activities; development of computer software; and ocean transportation of ash and fly ash.

Additionally, the company provides civil engineering, and construction management and services; and engineering services for atmospheric and water pollutant removal equipment.

Further, it is involved in the consulting business.

The company has 60 hydroelectric power plants with a total capacity of 8,560 MW; 13 thermal power generation facilities with a total capacity of 9,200 MW; 21 wind power facilities with a total capacity of 500 MW; 1 geo-thermal facility with a total capacity of 23 MW; and 2,410.1 kilometers of power transmission lines, and 9 substations and converter stations, as well as operates 33 power generation facilities with a total capacity of 6,523 MW located in Thailand, the United States, China, and internationally.

The company was incorporated in 1952 and is headquartered in Tokyo, Japan.