Nyu-zeki is an earthfill dam located in Chiba Prefecture in Japan.

The catchment area of the dam is 0.7 km2.

The dam impounds about 2 ha of land when full and can store 146 thousand cubic meters of water.

The construction of the dam was completed in 1940.

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