宝光坊泉源
Hōkōbō SpringOperated by · 湯〜モアリゾート 太山寺温泉 なでしこの湯
ラ
Radon
- Color
- colorless and clear
- Taste
- tasteless
- Odor
- faint hydrogen sulfide
Sodium Chloride-Bicarbonate spring
High radon
Composition fingerprint0.2 g/kg dissolved · Hypotonic
Na⁺77
Ca²⁺17
Cl⁻40
HCO₃⁻38
◀ CationsAnions ▶
- Sodium Na⁺
- salt's cation — pairs with chloride to make the water salty.
- Chloride Cl⁻
- table-salt anion — coats the skin and holds heat in.
Known good for
- Aches & jointsstiff shoulders
- Smooth skindry, rough skin
- Recoveryfatigue, stress
Hōkōbō Spring is a radon-bearing, weakly radioactive simple thermal water (hypotonic, alkaline, low-temperature). Mineralization is light at 224.5 mg/kg — gentle on the body — and the pH of 8.7 puts it squarely in Japan's alkaline beauty-water family with a slippery feel on the skin. At the source the water is colorless and clear with a faint rotten-egg note from hydrogen sulfide, and radon at 144 Bq/kg places it in the so-called hormesis tradition.
Sampled at wellhead·Analyzed Sep 26, 2023·株式会社 三計テクノス·Cert no. 熊本県第3号
