Rich in active gases or metals — a strong mineral character.
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
FerBicarbonatesManganèse
Yorimichi no Yu, in Fuefuki, Yamanashi Prefecture, offers mildly acidic (pH 6.3) iron-rich water at 41°C. The facility includes indoor pools, a sauna, massage and a hammam.
Insider tip — This Yamanashi overnight onsen facility sits in the Fuefuki river valley at the foot of the Southern Alps, where iron-bearing hot springs emerge from Mesozoic basement rock. Guests who stay overnight are treated to stunning views of Mount Fuji at dawn when the peak rises above the orchard-covered hills of the Kofu Basin. The iron-rich waters have a mild metallic tang and leave skin noticeably smooth. The surrounding Fuefuki valley is Japan's leading peach and grape-growing region, and fruit-themed bath additives are a seasonal speciality.