| Hitotsuse Dam | |
| Dam Crosses: | Hitotsuse River |
| Location: | Saito, Miyazaki, Japan |
| Dam Type: | Concrete arch dam |
| Dam Length: | 415.6 m |
| Dam Height: | 130 m |
| Dam Volume: | 555,000 m3 |
| Construction Began: | 1960 |
| Opening: | 1963 |
| Res Name: | Mera Reservoir |
| Res Capacity Total: | 261,315,000 m3 |
| Res Catchment: | 445 km2 |
| Res Surface: | 686 ha |
is a dam in Saito, Miyazaki Prefecture, Japan, completed in 1963.[1]
Many roads, schools, houses, and farmland were submerged in the construction.