| Maruyama Dam | |
| Dam Crosses: | Kiso River |
| Location: | Mitake, Gifu Prefecture, Japan. |
| Dam Length: | 260 m |
| Dam Height: | 98.2 m |
| Construction Began: | 1943 |
| Opening: | 1955 |
| Owner: | MLIT and Kansai Electric Power Company |
| Res Capacity Total: | 79,520,000 m3 |
| Res Catchment: | 2,409.0 km2 |
| Res Surface: | 263 hectares |
| Coordinates: | 35.4689°N 137.1722°W |
The is a dam on the border of Mitake and Yaotsu in Gifu Prefecture, Japan. It was built on the upper reaches of the Kiso River system. It is a gravity dam that is 98.20NaN0 tall. It is the site of a power plant.[1]
It was built after World War II as part of a large, nationwide dam building project.
Sosui Gorge (蘇水峡 Sosui-kyō) was formed by the completion of the dam. Along with Ena Gorge further upstream, the area is part of the Hida-Kisogawa Quasi-National Park.