混合泉
Sumatakyo Onsen Mixed SpringOperated by · 川根本町 観光交流課
Mixed source
黄
Sulfur
- Color
- almost colorless and transparent
- Taste
- faintly of hydrogen sulfide
- Odor
- faint hydrogen sulfide
Bicarbonate spring
pH 9.1AlkalineHot source · 45°CSulfur-richHigh silicaTop-decile alkaline
Composition fingerprint0.7 g/kg dissolved · Hypotonic
K⁺1
HCO₃⁻92
◀ CationsAnions ▶
- Potassium K⁺
- minor; matters for drinking limits.
- Bicarbonate HCO₃⁻
- "soda" — softens skin, leaves it smooth.
Known good for
- Skin conditionsatopic skin, eczema
- Circulationtired legs
- Aches & jointsstiff shoulders
- Sensitive-skin cautionbroken or dry skin
A blended source classified as a simple sulfur spring. The water is almost colorless and clear, carrying the characteristic faint rotten-egg note of hydrogen sulfide. At pH 9.1 it is firmly alkaline, sitting near the top of the slippery 'beauty-water' range that leaves skin feeling smooth. It also runs notably high in metasilicic acid at 52.8 mg/kg, which adds a thin silica film for a softer after-feel.
Sampled at mixing tank·Analyzed Oct 11, 2023·一般財団法人静岡県生活科学検査センター·Cert no. 第 M23017 号
