Ohnita Dam is a gravity dam located in Gunma Prefecture in Japan.

The dam is used for flood control and water supply.

The catchment area of the dam is 4.4 km2.

The dam impounds about 3 ha of land when full and can store 437 thousand cubic meters of water.

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