| Nakaiwa Dam | |
| Location: | Tochigi Prefecture, Japan |
| Dam Length: | 107.9m |
| Dam Height: | 26.3m |
| Construction Began: | 1922 |
| Opening: | 1924 |
| Res Capacity Total: | 1488 thousand cubic meters |
| Res Catchment: | 697 sq. km |
| Res Surface: | 12 hectares |
| Coordinates: | 36.7867°N 139.7039°W |
| Location Map: | Japan |
Nakaiwa Dam is a gravity dam located in Tochigi prefecture in Japan. The dam is used for power production. The catchment area of the dam is 697 km2. The dam impounds about 12 ha of land when full and can store 1488 thousand cubic meters of water. The construction of the dam was started on 1922 and completed in 1924.[1]