1号地A3号・白須8号泉 混合泉
No.1 A3 + Shirasu No.8 Blended SpringMixed source
曹
Bicarbonate
+ Sulfur
Sodium spring
Hot source · 84°CSulfur-rich
Composition fingerprint0.6 g/kg dissolved · Hypotonic
Na⁺93
HS⁻5
◀ CationsAnions ▶
- Sodium Na⁺
- salt's cation — pairs with chloride to make the water salty.
- Hydrogen sulfide HS⁻
- sulfur character — antibacterial.
Known good for
- Smooth skindry, rough skin
- Skin conditionsatopic skin, eczema
- Circulationtired legs
- Sensitive-skin cautionbroken or dry skin
A sodium-led bicarbonate spring with a sulfur edge — classic 'jūsō-sen' soda-water territory layered with the unmistakable rotten-egg note of H₂S. The wellhead runs hot at 83.5 °C, among Japan's hottest natural sources, and still reaches the bath at 71.8 °C. Weakly alkaline (pH 8.2) and lightly mineralized, it sits in the Japanese 'beauty-water' family — soft on the skin despite the heat. Diluted with fresh water at the bath but otherwise served as flowing source water.
Sampled at wellhead·Analyzed May 20, 2019·公益財団法人 宮城県公害衛生検査センター·Cert no. 1143
