Usunaka Dam
Location of Usunaka Dam in Japan
Location	Toyama Prefecture, Japan
Coordinates	36°28′07″N 136°51′16″E / 36.46861°N 136.85444°E / 36.46861; 136.85444
Construction began	1975
Opening date	1993
Dam and spillways
Height	68.9m
Length	238m
Reservoir
Total capacity	6950 thousand cubic meters
Catchment area	13.5 sq. km
Surface area	30 hectares

Usunaka Dam is a rockfill dam located in Toyama prefecture in Japan. The dam is used for flood control and irrigation. The catchment area of the dam is 13.5 km². The dam impounds about 30 ha of land when full and can store 6950 thousand cubic meters of water. The construction of the dam was started on 1975 and completed in 1993.^[1]