Rich in active gases or metals — a strong mineral character.
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
SoufreSulfuresSulfates
Oshiro Onsen, in Nishimeya, Aomori Prefecture, draws sulfurous water at 42°C. The bathhouse includes an indoor bath, an outdoor rotenburo and a sauna.
Insider tip — Oshiro Onsen guards the entrance to Nishimeya-mura, the gateway village to the Shirakami-Sanchi UNESCO World Natural Heritage Site — the largest remaining virgin beech forest in East Asia. The mountain spring is the last warm stop before entering the untouched wilderness of ancient beech, serow, and golden eagles.