Tamoyada dam is a gravity barrage-dam located in Saitama prefecture in Japan. The structure is used to divert water for agriculture, and to generate hydro-electricity. The catchment area of the dam is 893 km. The dam impounds about 47ha of land when full and can store 3,501,000 cubic meters of water. The construction of the dam was started on 1962 and completed in 1964.