原保温泉 原保1号
Harubo Onsen Spring No. 1湯
Simple
- Color
- almost colorless and transparent
- Taste
- tasteless
- Odor
- odorless
Sodium Carbonate-Bicarbonate spring
pH 9.2AlkalineCold mineral source · 25°CHigh silicaCold mineralTop-decile alkaline
Composition fingerprint0.2 g/kg dissolved · Hypotonic
Na⁺86
CO₃²⁻42
HCO₃⁻41
◀ CationsAnions ▶
- Sodium Na⁺
- salt's cation — pairs with chloride to make the water salty.
- Carbonate CO₃²⁻
- strongly alkaline; slippery feel.
Known good for
- Smooth skindry, rough skin
- Recoveryfatigue, stress
A simple-type cold mineral spring that qualifies as an onsen on the strength of its metasilicic acid rather than any therapeutic anion. At pH 9.2 it is genuinely alkaline, giving the slippery, soft feel of Japan's beauty-water family. It carries 70.4 mg/kg of metasilicic acid, which leaves a thin silica film that makes skin feel smoother. Lightly mineralized and gentle on the body, and being a cold mineral source at 24.8 °C it is reheated for bathing.
Sampled at wellhead·Analyzed Mar 1, 2017·一般財団法人静岡県生活科学検査センター·Cert no. 第 M16047 号