Oguninuma Marshland

A lake in Kitashiobara Village, Yama County. It's a caldera like that was formed by volcanic activity nearly 500,000 years ago. The lake sits at an altitude of 1000 meters and the Oguninuma marshland that surrounds the lake has been designated the Oguninuma Marshland Botanical Area, a Japanese Natural Monument. The area is filled with an abundance of nature and in late June a large number of Nikko day lilies come into bloom.