Rich in active gases or metals — a strong mineral character.
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
SoufreSulfuresSulfates
Appi Onsen Shirakaba no Yu, in the town of Hachimantai, Iwate Prefecture, draws sulfurous water at 44°C, with an indoor bath, an outdoor rotenburo and a sauna.
Insider tip — Appi Onsen Shirakaba no Yu serves the high-altitude Appi Kogen resort plateau in Iwate Prefecture, where volcanic springs bubble up at the foot of beech and birch forests. The sulfurous water at 44°C is especially prized in winter when skiers descend from the slopes and submerge aching muscles in the steaming outdoor pools. Snow-draped birch trees visible from the rotenburo create a view that defines classic Tohoku winter aesthetics. Summer hiking and autumn leaf-peeping draw equal numbers, making Appi a genuine four-season destination.