石湯
IshiyuOperated by · 34人共有者代表 大山 信弥
- Color
- colorless and transparent
- Taste
- tasteless
- Odor
- odorless
Sodium-Calcium Chloride-Bicarbonate spring
- Sodium Na⁺
- salt's cation — pairs with chloride to make the water salty.
- Chloride Cl⁻
- table-salt anion — coats the skin and holds heat in.
- Smooth skindry, rough skin
- Recoveryfatigue, stress
A weakly alkaline simple thermal spring rising at 36.7 °C, colourless and odourless with no notable taste — the kind of unfussy, low-irritation water that suits long soaks. Total dissolved solids sit at a light 890 mg/kg, with sodium and calcium leading the cations and chloride balanced against bicarbonate among the anions, so nothing dominates the chemistry. The pH of 8.5 lands in 'beauty-water' territory: mildly alkaline, soft on the skin, with a faintly slippery feel. The source feeds the Ishiyu communal bath in Yunohana Onsen — a self-flowing well, served plainly as a gentle, everyday hot spring rather than a high-mineral cure-water.
Sampled at wellhead·Analyzed Jul 6, 2015·株式会社 新潟温泉分析センター·Cert no. 08145号