Yokoyama Dam - Wikipedia

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Yokoyama Dam

Location	Ibigawa, Gifu Prefecture, Japan.
Coordinates	35°35′35″N 136°27′19″E / 35.59306°N 136.45528°E / 35.59306; 136.45528
Construction began	1957
Opening date	1964
Dam and spillways
Impounds	Ibi River
Height	80.8 m
Length	220.0 m
Reservoir
Total capacity	43,000,000 m³
Catchment area	471.0 km²
Surface area	170 hectares