| Masuma Dam | |
| Location: | Chiba Prefecture, Japan |
| Dam Length: | 145m |
| Dam Height: | 34m |
| Construction Began: | 1966 |
| Opening: | 1969 |
| Res Capacity Total: | 520 thousand cubic meters |
| Res Catchment: | 2.2 sq. km |
| Res Surface: | 54 hectares |
| Coordinates: | 35.0694°N 139.9286°W |
| Location Map: | Japan |
Masuma Dam is a gravity dam located in Chiba Prefecture in Japan. The dam is used for water supply. The catchment area of the dam is 2.2 km2. The dam impounds about 54 ha of land when full and can store 520 thousand cubic meters of water. The construction of the dam was started on 1966 and completed in 1969.[1]