Numajiri Onsen

Numajiri Onsen flows with sulfate and mildly acidic thermal waters in Japan, combining the distinctive properties of volcanic sulfate mineral chemistry with the skin-active character of mildly acidic water, producing a bathing experience that is distinctively potent and associated in Japanese thermal tradition with relaxation and the comfort of the skin, in the tradition of Japan's most actively volcanic geothermal springs. The name Numajiri, suggesting a swampy or marshy area at the end of a valley, evokes a geological setting where geothermal activity and standing water intersect in the kind of low-lying volcanic terrain where mineral-rich steam and thermal water concentrate in natural depressions before rising to the surface as hot springs. Numajiri Onsen's acidic and sulfate mineral character connect it to the tradition of Japan's most mineral-intensive volcanic springs, where the potency of the earth's chemical gifts is experienced most directly as a physically active interaction between the volcanic mineral water and the skin of those who immerse themselves in its warmth.