Shimagawa Dam

Last updated December 14, 2025

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Shimagawa Dam

Interactive map of Shimagawa Dam
Location	Gunma Prefecture, Japan.
Coordinates	36°41′47″N138°46′53″E / 36.69639°N 138.78139°E / 36.69639; 138.78139
Construction began	1980
Opening date	1999
Dam and spillways
Type of dam	Gravity
Impounds	Shima River
Height	89.5 m (294 ft)
Length	330 m (1,080 ft)
Reservoir
Total capacity	9,200,000 m³ (320,000,000 cu ft)
Catchment area	28.4 km² (11.0 sq mi)

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

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Dams in Gunma Prefecture

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