川原湯共同浴場源泉
Kawarayu Communal Bathhouse SpringOperated by · 川原湯共同浴場
- Color
- colorless and clear
- Taste
- astringent
- Odor
- hydrogen sulfide
Hydrogen-Aluminum Sulfate-Chloride spring
- Hydrogen H⁺
- makes the water acidic — sharp and bactericidal.
- Sulfate SO₄²⁻
- "gypsum / Glauber's salt" — vessels and wound healing.
- Skin conditionsatopic skin, eczema
- Circulationtired legs
- Aches & jointsstiff shoulders
- Sensitive-skin cautionbroken or dry skin
The source feeding the Kawarayu communal bathhouse in Zao Onsen, Yamagata: a strongly acidic, sulfur-bearing aluminium-sulfate-chloride water. It is acidic enough to prickle on contact — the sharply acidic style associated with stubborn skin conditions — and carries the unmistakable rotten-egg note of H₂S at the spout, with an astringent tang if tasted. Moderately mineralized with noticeable body, it also holds a generous 195 mg/kg of metasilicic acid, which tempers the bite with a smoothing silica film. The posted composition notice records the water reaching the bath at the same temperature as the source, and the certificate's sample was drawn in the bathhouse tub itself rather than at a wellhead.
Sampled at community bath·Analyzed Feb 7, 2020·株式会社丹野·Cert no. O1900013