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Shimokubo Dam is a dam in the Gunma Prefecture of 
Japan
Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north ...
, completed in 1968.
References
Dams in Gunma Prefecture Dams in Saitama Prefecture Dams completed in 1968 {{Kantō-dam-stub