| Ushimagusa Dam | |
| Dam Type: | Embankment dam |
| Res Name: | Ayukawa Lake |
| Location: | Gunma Prefecture, Japan |
| Dam Length: | 257.5m (844.8feet) |
| Dam Height: | 27.8m (91.2feet) |
| Construction Began: | 1951 |
| Opening: | 1955 |
| Res Capacity Total: | 900000m2 |
| Res Catchment: | 6.2km2 |
| Res Surface: | 10 hectares |
| Coordinates: | 36.2133°N 139.035°W |
| Location Map: | Japan |
Ushimagusa Dam is an earthfill dam located in Gunma Prefecture in Japan. The dam is used for irrigation. The catchment area of the dam is 6.2 km2. The dam impounds about 10 ha of land when full and can store 900 thousand cubic meters of water. The construction of the dam was started on 1951 and completed in 1955.[1]