Things to see and do Noboribetsu Onsen

It is rumored to be the purest lake in Japan, after the Akan National Park. The color of the water becomes a deep blue on sunny days. The lake was formed in a caldera and its water is exceptionally cold, making it impossible to swim. The lake is renowned for its sockeye salmon fishing and is also home to freshwater crayfish and salamanders. The absolute clarity of the water makes it easy to see them. In addition to the beautiful surrounding hikes, you can also take a boat ride on the lake.