The objectives of this multipurpose dam are: (1) flood control of the Kizu-gawa and Yodo-gawa areas; (2) the common purpose of dams in Japan (supply of water for agriculture that is the vested right of the farmlands in Kizu-gawa area); (3) the supply of drinking water to densely-populated areas such as Osaka City, Hirakata City, Moriguchi City (Osaka Prefecture): and Kobe City, Nishinomiya City, and Amagasaki City (Hyogo Prefecture); (4) hydroelectric power generation by the Kansai Electric Power Co., Inc. (permitted output: 6,000 kW).
目的は木津川・淀川流域の洪水調節、日本のダム利用目的（木津川流域の既成農地が取水している既得農業用水の確保）、大阪市・枚方市・守口市といった大阪府及び神戸市・西宮市・尼崎市等兵庫県の人口密集地帯への上水道供給、関西電力が行う水力発電（認可出力6,000kW）の多目的ダムである。