Ishikari River
After the Second world war, the comprehensive Ishikari River system development plan in Hokkaido was started by the Ministry of Land, Infrastructure, Transport and Tourism in parallel with the electric power generation project. The Ikushunbetsu River and Ashibetsu Rivers were targeted within the scope of the electric power generation project which led to the creation of the dams. The Ashibetsu Dam is the smallest of the dams of the Ishikari River system. It is the only multipurpose dam for irrigation, water supply and electricity generation without Flood control aside from the Sarutani Dam located in Nara Prefecture.