Usunaka Dam is a rockfill dam located in Toyama prefecture in Japan.

The dam is used for flood control and irrigation.

The dam impounds about 30 ha of land when full and can store 6950 thousand cubic meters of water.

The construction of the dam was started on 1975 and completed in 1993.

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