夜明薬湯温泉
Yoake Yakutō Onsen曹
Bicarbonate
+ Chloride
- Color
- faintly yellow
- Taste
- faintly metallic (iron)
- Odor
- odorless
Sodium Bicarbonate-Chloride spring
pH 7.9Weakly alkalineHot source · 45°C
Composition fingerprint2.2 g/kg dissolved · Hypotonic
Na⁺97
HCO₃⁻71
Cl⁻27
◀ 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
- Aches & jointsstiff shoulders
- Warmingcold sensitivity
A sodium-led bicarbonate-chloride spring — the classic jūsō-sen (soda-water) style with a salty edge layered in. Weakly alkaline and soft on the skin, it sits in the Japanese beauty-water family valued for leaving skin smooth. The water carries a faint yellow tint and a slight iron taste, with moderate mineralization (about 2,205 mg/kg dissolved solids) giving it noticeable body.
Sampled at wellhead·Analyzed Sep 18, 2018·一般財団法人 九州環境管理協会·Cert no. 第18B-2-0385号