The Electric Power Development Co. Ltd. operating under the brand name J-POWER formerly Denpatsu is the largest electric utility in Japan. It mainly produces Electricity from Coal and Hydroelectric Power Stations. It also has a few wind farms and is currently building a nuclear plant in Ohma Aomori prefecture that is scheduled to begin operations in November 2014. J-Power is the sole operator of the transmission lines connecting the four main islands of Japan.
Electric Power Development Company is founded in 1952.
Key people are Yoshihiko Nakagaki and President.