Rich in active gases or metals — a strong mineral character.
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
SoufreSulfuresSulfates
Set on the Geto Kogen highlands near Kitakami, Iwate Prefecture, Usagimori no Yu offers sulfurous water at 44°C. The mountain bathhouse includes an indoor bath, an outdoor bath (rotenburo) and a sauna.
Insider tip — Geto Kogen Onsen Usagimori no Yu (Rabbit Forest Bath) is a highland resort onsen in the Geto mountains of Iwate Prefecture, celebrated for its milky-white sulfurous waters. The remote location at over 700 metres elevation means heavy snowfall in winter, transforming the outdoor baths into steaming pools surrounded by snowfields. Summer brings lush beech forests and the sound of cicadas echoing off the valley walls. The name 'rabbit forest' recalls the hares that still roam the surrounding slopes.