Nuppanosawa Dam (Japanese: ヌッパの沢ダム) is an earthfill dam located in Hokkaido Prefecture in Japan. The dam is used for irrigation. The catchment area of the dam is 4.5 km. The dam impounds about 5 ha of land when full and can store 300 thousand cubic meters of water. The construction of the dam was started on 1931 and completed in 1933.