Matanoagawa Dam, Gravity dam in Tottori Prefecture, Japan

Matanoagawa Dam is a concrete structure in Tottori Prefecture that spans a valley and stores water for power generation. The facility operates as part of a pumped storage system that moves water between different reservoirs depending on energy needs.

Construction of this concrete facility started in 1978 and finished in 1984 after authorities sought a solution for regional power supply. The pumped storage project was part of Japan's strategy to use hydropower more efficiently.

The dam's reservoir is named Sarutobi-ko. The Chugoku Electric Power Company runs a visitor hall at Kofu in a building styled after a Tyrolean chalet, matching the town's "Tyrol Village" theme; it displays models of the power station and is free to enter.

The dam itself is not open to visitors; the Chugoku Electric Power information hall in Kofu town displays a model of the Matanogawa power station and has a Tyrolean-style exterior. It is open 9:00 to 16:00, free of charge, closed Mondays and from mid-December through the end of February. The dam lies just upstream of Muko Station on the JR Hakubi Line, reached via Route 181 and Prefectural Route 113.

The reservoir connects with a second dam located about 6 kilometers away in a neighboring prefecture to form a shared water system. This arrangement allows water to be transported between the two locations and power generation adjusted based on current demand.