There's a foot bath (あし温, Ashiyu) where you can go and dip your feet in the hot springs water of Kawayu-Onsen for free. Recommended to bring a towel. The water is saturated with minerals and is smooth to the touch.
taken on 11 August 2017, 15:00
location: Foot Bath in Kawayu-Onsen, Hokkaidō, Japan