Nakagi Dam is a dam near Annaki, in the Gunma Prefecture of Japan.

Nakagi Dam
LocationAnnaki, Gunma Prefecture, Japan.
Coordinates36°19′07″N 138°44′43″E / 36.31861°N 138.74528°E / 36.31861; 138.74528
Construction began1951
Opening date1959
Dam and spillways
Type of damGravity
Height41 m (135 ft)
Length148.1 m (486 ft)
Reservoir
Total capacity1,600,000 m3 (57,000,000 cu ft)
Catchment area13.1 km2 (5.1 sq mi)
Surface area13.6 hectares