Sunayu is located on the shore of Lake Kussharo, and the sandy beach at the edge of the waves is a hot spring. As soon as you dig in the sand, hot hot springs will gush out. Sunayu is a spot that everyone from children to adults can enjoy, as anyone can create their own open-air bath.

The hot springs at Sunayu are simple springs with a temperature of approximately 40℃. The benefits of sand baths include promoting blood circulation and relieving fatigue.

Sunayu is a popular tourist spot where you can enjoy hot springs while admiring the view of Lake Kussharo.