Free-flow from source
Momotaro Onsen
A simple weakly radioactive cold mineral spring with a pH of 9.3, poured into observation tubs overlooking the Sasagase River valley. Rich in metasilicic acid, it is known as a beauty bath that leaves the skin smooth and supple. The indoor baths include hot and lukewarm baths, while the open-air area features a splendid rock bath, all of them free-flowing and heated without filtration from the source. Its soft texture and sense of oneness with nature gently loosen both body and mind.