Hiroto Dam (Japanese: 広渡ダム) is a gravity dam located in Miyazaki Prefecture in Japan.

The dam is used for flood control.

The dam impounds about 38 ha of land when full and can store 6400 thousand cubic meters of water.

The construction of the dam was started on 1969 and completed in 1993.

This article about a dam or floodgate on Kyushu, Japan is a stub.