Nyu Dam
Location of Nyu Dam in Japan
Location	Gunma Prefecture, Japan
Coordinates	36°15′39″N 138°49′55″E / 36.26083°N 138.83194°E / 36.26083; 138.83194
Construction began	1936
Opening date	1952
Dam and spillways
Type of dam	Embankment
Height	17.3 m (57 ft)
Length	398.2 m (1,306 ft)
Reservoir
Creates	Nyu Lake
Total capacity	1,447,000 m3 (51,100,000 cu ft)
Catchment area	14.6 km2 (5.6 sq mi)
Surface area	23 hectares

Nyu Dam is an earthfill dam located in Gunma Prefecture in Japan. The dam is used for irrigation. 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.^[1]