Motona Dam is a rockfill dam located in Chiba Prefecture in Japan.

The catchment area of the dam is 0.1 km2.

The dam impounds about 1 ha of land when full and can store 77 thousand cubic meters of water.

The construction of the dam was started on 1978 and completed in 1979.

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