Akimoto Lake

Akimoto Lake is a lake that is technically classified as a reservoir. It straddles the border of the village of Kitashiobara and the town of Inawashiro, both in the Yama district of Fukushima Prefecture, Japan. Along with Hibara Lake and Onogawa Lake, it forms what is known as the "Inner Bandai Plateau Tri-Lake Formation".

Source: Wikipedia