Lake Akan is a freshwater lake sitting in the center of East Hokkaido. It is also a famous place for velvet-like moss globes of Marimo that are formed by the complex tides of the lake. Taking a pleasure boat and landing at Churui Island, we can see beautiful Marimo moss balls, with the largest being 30cm in diameter. Early in the morning, we went up Mt. Hakutosan near the lake. It was really impressive to see Lake Akan and Mt. Oakan with thin layers of clouds hanging over their crowns. Along the lakeside, there is a site of the bubbling mud of an active volcano, called “Bokke” in Ainu meaning boiling place.