龍神温泉 下の湯
Ryujin Onsen Shimo-no-yuOperated by · 龍神温泉協会
曹
Bicarbonate
- Color
- colorless and transparent
- Taste
- tasteless
- Odor
- odorless
Sodium Bicarbonate spring
pH 7.8Weakly alkalineHot source · 46°CHigh silica
Composition fingerprint1.4 g/kg dissolved · Hypotonic
Na⁺96
HCO₃⁻91
◀ 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
- Recoveryfatigue, stress
A sodium-led bicarbonate hot spring in the classic jūsō-sen (soda-water) style. The water emerges at 46 °C, weakly alkaline (pH 7.8) and soft on the skin, sitting squarely in Japan's beauty-water family. A generous 65 mg/kg of metasilicic acid adds a thin silica film that leaves skin noticeably smoother afterwards.
Sampled at wellhead·Analyzed Jun 16, 2008·和歌山県環境衛生研究センター·Cert no. 温泉第909号