Rich in active gases or metals — a strong mineral character.
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
SoufreSulfuresSulfates
Yakuoji Onsen Yumoto Io no Yu, in Minami, Tokushima, takes its name from its sulfurous water, heated to 42°C. The bathhouse offers an indoor bath, an outdoor rotenburo bath and a sauna.
Insider tip — Yakuoji Io no Yu serves Hiwasa where Temple No. 23 of the Shikoku 88-temple pilgrimage stands facing the Pacific. Yakuoji is dedicated to protection from calamity and longevity, and pilgrims in white garments climb its stone steps removing their footwear at the entrance. The sulfurous spring water near this sea cliff temple has accompanied Buddhist rituals practiced here for over 1,200 years, making this a spiritually charged stop on the pilgrim route.