With a total installed capacity of 1,200 megawatts (1,600,000 hp), it is one of the largest pumped-storage power stations in Japan.

Like most pumped-storage facilities, the power station uses two reservoirs, releasing and pumping as the demand rises and falls.

The natural influx on water on the upper reservoir is limited, therefore the plant can be considered almost pure pumped-storage.

The entire upper pond was made waterproof with asphalt to avoid leakage in the surrounding permeable soil.

All units are adjustable speed systems, allowing for a rapid variation of power levels during both pumping and generation.