A plan to build an auxiliary multipurpose dam on the Asuwa River was finalised in 1967, but no work was actually begun until 1994.

Then project immediately encountered strong opposition by the residents of the site to be submerged.

In July 2004, concentrated torrential rains attacked Fukui Prefecture, especially the Asuwa broke its embankments.

Therefore, although the Asuwawa reservoir is usually empty, when flooding occurs it stores water and gradually releases downstream.

This article about a dam or floodgate in Chūbu region of Honshu, Japan is a stub.