Bon no Yu
A bicarbonate spring with one of the highest concentrations in the Kanto region, rich in sodium bicarbonate. Its defining feature is the silky texture you can feel the moment you step into the water, leaving your skin moist and smooth after bathing. You can fully enjoy its rich properties in the open-air bath overlooking the Arakawa River and in the large indoor bath. It also offers excellent heat retention, making it possible to enjoy an exquisite therapeutic bathing experience that warms both body and mind from the core.