鬼石の湯
Oniishi no Yu SpringOperated by · 株式会社 別府観光産業
- Color
- colorless and clear
- Taste
- faintly salty with a faint metallic note
- Odor
- almost odorless
Sodium Chloride spring
- 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.
- Warmingcold sensitivity
- Aches & jointsstiff shoulders
- Smooth skindry, rough skin
A sodium chloride spring rising in the Kannawa district of Beppu and running very hot at 93.0 °C — among Japan's hottest natural sources. It is weakly acidic, which gives the water a faintly tightening feel on the skin; the water itself is colorless and clear, lightly salty on the tongue with a faint metallic note. The chemical standout is metasilicic acid at 584 mg/kg, an unusually generous figure that places this water in Japan's beauty-water family and leaves skin noticeably smoother. Overall mineralization is moderate at 4,670 mg/kg of dissolved solids, enough for real body without heaviness, and the certificate's sample was drawn at the storage-tank outlet rather than at the wellhead.
Sampled at delivery pipe·Analyzed Aug 25, 2021·公益社団法人大分県薬剤師会·Cert no. 大薬検 第7R-21080003号