薬師泉源(さくら湯飲用)
Yakushi Spring (Sakura-yu Drinking)Drinkable
ラ
Radon
Sodium Bicarbonate spring
High radonHigh silica
Composition fingerprint0.3 g/kg dissolved · Hypotonic
Na⁺76
Ca²⁺18
HCO₃⁻70
CO₃²⁻15
◀ 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
- Aches & jointsstiff shoulders
- Smooth skindry, rough skin
- Recoveryfatigue, stress
The Yakushi spring at Sakura-yu is classified as a weakly radioactive simple thermal water — light on total dissolved solids (270 mg/kg) but carrying a substantial 141 Bq/kg of radon, which places it in Japan's hormesis-tradition radon-spring lineage. Alkaline at pH 8.86, the water is soft on the skin, and a generous 71 mg/kg of metasilicic acid leaves the faint moisturising film that makes the touch noticeably smooth. Sampled from a drinking fountain, this is the source served for insen (drinking spring) (drinking) at the bath, with a long-standing reputation for chronic GI complaints.
Sampled at drinking fountain·Analyzed Feb 3, 2016·株式会社 再春館安心安全研究所