Konokawauchi Dam (Japanese: 木之川内ダム) is a rockfill dam located in Miyazaki Prefecture, Japan.

The catchment area of the dam is 23.5 km2.

The dam impounds about 40 ha of land when full and can store 6270 thousand cubic meters of water.

The construction of the dam was started on 1983 and completed in 2009.

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