The Okutataragi Pumped Storage Power Station is a large pumped-storage hydroelectric power station in Asago, in the Hyōgo Prefecture of Japan. With a total installed capacity of a 1,932 MW, it is one of the largest pumped-storage power stations in the world, and the largest in Japan.

Construction on the facility began in 1970 and was completed in 1974. The first of six pump-generating turbines was commissioned in June 1974, the last in June 1998.

Open-loop Pumped Hydro Storage