| Niwaki Dam | |
| Location: | Saga Prefecture, Japan |
| Dam Length: | 130m |
| Dam Height: | 26.2m |
| Construction Began: | 1985 |
| Opening: | 1994 |
| Res Capacity Total: | 600 thousand cubic meters |
| Res Catchment: | 1.2 sq. km |
| Res Surface: | 9 hectares |
| Coordinates: | 33.1258°N 129.9597°W |
| Location Map: | Japan |
Niwaki Dam is a concrete gravity dam located in Saga Prefecture in Japan. The dam is used for irrigation. The catchment area of the dam is 1.2 km2. The dam impounds about 9 ha of land when full and can store 600 thousand cubic meters of water. The construction of the dam was started on 1985 and completed in 1994.[1]