The Shin-Takasegawa Pumped Storage Station (新高瀬川発電所) uses the Takase River (a tributary of the Shinano River) to operate a pumped storage hydroelectric scheme about 12 kilometres (7.5 mi) west of Ōmachi in Nagano Prefecture, Japan.

The power plant has a 1,280 megawatts (1,720,000 hp) installed capacity and its upper reservoir is created by the Takase Dam, a rock-fill dam — which at 176 metres (577 ft) in height is the tallest of its type in Japan.

[1] During periods of high energy demand, water from the Takase Reservoir is released down to the power station.

At the power station, the water operates four 320 megawatts (430,000 hp) reversible Francis turbine-generators before being discharged into the lower reservoir, created by the Nanakura Dam.

To protect in against rapid draw-down in water levels (as much as 28 metres (92 ft)), the top of the dam is coated in hard rock materials.