Mazegawa Dam

 is a dam in the city of Gero in Gifu Prefecture, Japan on the Maze River, part of the Kiso River system. The dam is a concrete gravity dam with a height of 44.5 meters. It was constructed for hydroelectric power generation and its associated power plant has a capacity of 288,000 kilowatts of power. It is managed by the Chubu Electric Power Company. 