Miyagawa Dam is a

dam A dam is a barrier that stops or restricts the flow of surface water or underground streams. Reservoirs created by dams not only suppress floods but also provide water for activities such as irrigation, human consumption, industrial use ...

in the Fukushima Prefecture of Japan, completed in 1962.

References

Dams in Fukushima Prefecture Dams completed in 1962 {{Japan-dam-stub