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Sankyo Seki Dam
Location of Sankyo Seki Dam in Japan
Location	Chiba Prefecture, Japan
Coordinates	35°4′27″N 140°3′45″E / 35.07417°N 140.06250°E / 35.07417; 140.06250
Opening date	1939
Dam and spillways
Height	15.4m
Length	40m
Reservoir
Total capacity	14 thousand cubic meters
Catchment area	0.2 sq. km
Surface area	hectares

Sankyo Seki Dam is an earthfill dam located in Chiba Prefecture in Japan. The dam is used for irrigation. The catchment area of the dam is 0.2 km². The dam can store 14 thousand cubic meters of water. The construction of the dam was completed in 1939.^[1]

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