別府市営海門寺温泉
Beppu Municipal Kaimonji OnsenOperated by · 別府市
曹
Bicarbonate
- Color
- colorless and clear
- Taste
- tasteless
- Odor
- odorless
Sodium Bicarbonate spring
pH 7.7Weakly alkalineHot source · 55°CHigh silica
Composition fingerprint1.4 g/kg dissolved · Hypotonic
Na⁺66
Ca²⁺14
Mg²⁺13
HCO₃⁻75
Cl⁻16
◀ 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 spring; the certificate records its legacy name as a pure jūsō-sen, and it reads that way: mildly alkaline, soft on the skin, with the smooth soda-water touch the style is known for. Dissolved solids sit at a moderate 1,364 mg/kg, enough mineral body to feel without weight. The standout figure is metasilicic acid at 260 mg/kg, a generous level that leaves the thin silica film Japan's beauty-water family is named for.
Sampled at delivery pipe·Analyzed Jan 8, 2020·公益社団法人大分県薬剤師会·Cert no. 大薬検 第7R-20010005号