Ononosawa Dam
Ononosawa Dam  is an earthfill dam located in Hokkaido Prefecture in Japan. The dam is used for irrigation. The catchment area of the dam is 0.5 km2. The dam impounds about 2  ha of land when full and can store 157 thousand cubic meters of water. The construction of the dam was completed in 1931. References

Dams in Hokkaido