Rich in active gases or metals — a strong mineral character.
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
SoufreSulfuresSulfates
Yukawa Onsen, run by the Shikisai no Yado Furusato inn, is also located in Nishiwaga, Iwate. Its sulfurous thermal water emerges at 42°C (pH 6.5), serving an indoor bath, an outdoor rotenburo and a sauna.
Insider tip — Yukawa Onsen in the Nishiwaga highlands celebrates the valley's extraordinary four-season transformation: spring cherry blossoms along mountain streams, summer beech forests in vivid green, autumn foliage (among the most intense in Tohoku), and winter deep-powder snowscapes. 'Furusato' (hometown/homeland) onsen names invoke the Japanese ideal of returning to roots — a rural mountain retreat that serves as an emotional anchor for those from Iwate's scattered mountain communities. The ryokan's sulfurous waters are a deep amber color typical of volcanic Kitakami springs.