Rich in active gases or metals — a strong mineral character.
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
SoufreSulfuresSulfates
Okushiobara Onsen Kappa is located in Nasushiobara, Tochigi Prefecture. Its sulfurous water resurfaces at 44°C and serves an indoor bath, an outdoor rotenburo pool and a sauna.
Insider tip — Okushiobara Onsen Kappa, the inner Shiobara kappa water sprite spring, sits in the volcanic gorge heart of the Shiobara district where the deepest sulfurous springs emerge from geothermal vents in the canyon walls. Kappa sprites in Japanese folklore are said to inhabit the coldest and deepest volcanic spring pools, and Okushiobara deep valley environment — misty, sulfurous, and ancient-feeling — makes the yokai legends entirely believable to visitors.