| Miyashita Dam | |
| Location Map: | Japan |
| Coordinates: | 37.4628°N 139.6292°W |
| Country: | Japan |
| Location: | Mishima |
| Construction Began: | 1941 |
| Opening: | 1946 |
| Owner: | Tohoku Electric Power |
| Dam Height: | 530NaN0 |
| Dam Length: | 1680NaN0 |
| Dam Volume: | 1520000NaN0 |
| Dam Crosses: | Tadami River |
| Spillway Type: | Tainter gates |
| Res Capacity Total: | 205000000NaN0 |
| Res Capacity Active: | 40560000NaN0 |
| Res Catchment: | 24670NaN0 |
| Plant Hydraulic Head: | 34.750NaN0 |
| Plant Commission: | December 1946 |
| Plant Turbines: | 5 x 18.8 MW Francis-type |
| Plant Capacity: | 94 MW |
Miyashita Dam is a gravity dam on the Tadami River 20NaN0 upstream of Mishima in the Fukushima Prefecture of Japan. It was constructed between 1941 and 1946 for the purpose of hydroelectric power generation. It supplies a 94 MW power station with water.[1]