Sonohara Dam is a dam in the Gunma Prefecture of Japan.

Sonohara Dam
LocationGunma Prefecture, Japan.
Coordinates36°38′20″N 139°10′31″E / 36.63889°N 139.17528°E / 36.63889; 139.17528
Construction began1958
Opening date1965
Dam and spillways
Type of damGravity
Height76.5 m (251 ft)
Length127.6 m (419 ft)
Reservoir
Total capacity21,310,000 m3 (753,000,000 cu ft)
Catchment area607.6 km2 (234.6 sq mi)
Surface area91 hectares