三峰温泉
Mitsumine OnsenOperated by · 有限会社 新成産業
湯
Simple
- Color
- colorless and clear
- Taste
- tasteless
- Odor
- faint hydrogen sulfide
Sodium Bicarbonate-Chloride spring
pH 8.4Weakly alkaline
Composition fingerprint0.3 g/kg dissolved · Hypotonic
Na⁺85
HCO₃⁻63
Cl⁻24
◀ CationsAnions ▶
- Sodium Na⁺
- salt's cation — pairs with chloride to make the water salty.
- Bicarbonate HCO₃⁻
- "soda" — softens skin, leaves it smooth.
Known good for
- Smooth skindry, rough skin
- Recoveryfatigue, stress
A simple thermal spring — colorless and clear, tasteless, and carrying a faint hydrogen sulfide note at the wellhead. Total dissolved solids come to just 321 mg/kg, so the water is lightly mineralized and gentle rather than assertive; weakly alkaline, it sits soft on the skin. What character it has comes from bicarbonate, which makes up just over 60% of the anions, while sulfur is present only in traces — the H₂S aroma reads as a hint rather than a strong smell.
Sampled at wellhead·Analyzed Feb 27, 2025·株式会社 環境科学研究所
