穴湯
Anayu SpringOperated by · 黒川温泉自治会
湯
Simple
- Color
- colorless and clear
- Taste
- tasteless
- Odor
- faint hydrogen sulfide
Sodium Sulfate-Chloride spring
pH 3.2Weakly acidicHot source · 60°CHigh silica
Composition fingerprint0.6 g/kg dissolved · Hypotonic
Na⁺57
Ca²⁺13
Al³⁺13
SO₄²⁻78
Cl⁻21
◀ CationsAnions ▶
- Sodium Na⁺
- salt's cation — pairs with chloride to make the water salty.
- Sulfate SO₄²⁻
- "gypsum / Glauber's salt" — vessels and wound healing.
Known good for
- Aches & jointsstiff shoulders
- Smooth skindry, rough skin
- Recoveryfatigue, stress
Anayu surfaces at a hot 60.4 °C as a simple thermal spring on the weakly acidic side (pH 3.22). Total dissolved solids are light at 568 mg/kg, but the water carries a generous 253 mg/kg of free CO2 and 157.7 mg/kg of metasilicic acid, giving the otherwise plain water a faint prickle and a touch of silica smoothness. A subtle hydrogen-sulfide note drifts off the surface as the bath stays warm well after exit.
Sampled at wellhead·Analyzed Apr 8, 2021·株式会社MCエバテック分析事業部 熊本分析センター·Cert no. X30-0867