Relaxing — deep, immediate muscle release.
Rich in active gases or metals — a strong mineral character.
Soft water — natural, classic buoyancy.
Yusenchi Onsen Koshuyokujo Senyu, in Totsukawa, Nara Prefecture, offers sulfurous thermal water at 42°C (pH 6.5). The bathhouse combines an indoor bath, an outdoor rotenburo and a sauna.