| Sakamoto Dam | |
| Dam Crosses: | Usui River |
| Dam Type: | Gravity |
| Res Name: | Lake Usui |
| Location: | Gunma Prefecture, Japan. |
| Dam Length: | 85m (279feet) |
| Dam Height: | 36.3m (119.1feet) |
| Construction Began: | 1985 |
| Res Capacity Total: | 778000m2 |
| Res Catchment: | 13.7km2 |
| Res Surface: | 7ha |
| Coordinates: | 36.3533°N 138.7076°W |
Sakamoto Dam is a dam in the Gunma Prefecture of Japan. It forms Lake Usui.