| Ichinotani-ike | |
| Location: | Yamaguchi Prefecture, Japan |
| Dam Length: | 70m |
| Dam Height: | 15m |
| Construction Began: | 1921 |
| Opening: | 1954 |
| Res Capacity Total: | 60 thousand cubic meters |
| Res Catchment: | 0.6 sq. km |
| Res Surface: | 1 hectares |
| Coordinates: | 34.1383°N 131.9367°W |
| Location Map: | Japan |
Ichinotani-ike is an earthfill dam located in Yamaguchi prefecture in Japan. The dam is used for irrigation. The catchment area of the dam is 0.6 km2. The dam impounds about 1 ha of land when full and can store 60 thousand cubic meters of water. The construction of the dam was started on 1921 and completed in 1954.[1]