Nyu Dam is an earthfill dam located in Gunma Prefecture in Japan.

The catchment area of the dam is 14.6 km2.

The dam impounds about 23 ha of land when full and can store 1447 thousand cubic meters of water.

The construction of the dam was started in 1936 and completed in 1952.

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