<b>Koya Dam</b> (<a href="https://ja.wikipedia.org/wiki/%E5%8F%A4%E8%B0%B7%E3%83%80%E3%83%A0" class="extiw" title="ja:古谷ダム">ja:古谷ダム</a>) is a dam in Nagano, Japan.
<a href="//commons.wikimedia.org/wiki/User:Qurren" title="User:Qurren">Qurren</a>
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<span class="int-own-work" lang="en">Own work</span>