The Pirika Dam (美利河ダム) is a dam located in Imakane, Setana District, Hiyama, Hokkaidō, Japan.

Pirika Dam
LocationHokkaidō, Japan
Construction began1975
Opening date1991
Dam and spillways
ImpoundsShiribeshi-Ribetsu River
Height40 m
Length251.7 m
Reservoir
Total capacity18,000,000 m3
Catchment area115 km2
Surface area185 hectares

At 1480 meters in length, it is the longest dam in Japan and the largest in southern Hokkaidō. It is known for hosting the longest fish race in Japan (2.4 km).[citation needed]

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42°28′18″N 140°11′47″E / 42.47153333°N 140.1964194°E / 42.47153333; 140.1964194