Sannosawa No.2 Dam (Japanese: 三の沢第二ダム) is an earthfill dam located in Hokkaido Prefecture in Japan. The dam is used for irrigation. The catchment area of the dam is 1.9 km2. The dam impounds about 6 ha of land when full and can store 700 thousand cubic meters of water. The construction of the dam was started on 1953 and completed in 1954.