湯王温泉
Yuo Onsen SpringSampled at mixing tank
湯
Simple
Classification
Sodium Bicarbonate-Chloride spring
A weakly alkaline simple thermal spring of light mineralization (467.7 mg/kg dissolved solids), but with a generous 136.9 mg/kg of metasilicic acid that lands it squarely in Japan's beauty-water family — the silica leaves a thin film that makes skin feel noticeably smoother. At the wellhead the water shows a faint yellow tint with a slight metallic note in both taste and smell; the bath is fed from a storage tank rather than directly from the wellhead.
pH
7.50
Weakly alkaline
Source temperature
34.5°C
Warm
Tonicity
0.47g/kg
Hypotonic
Flow rate
210L/min
Typical
Free CO₂
131mg/kg
Low
- Color
- faintly yellow and clear
- Taste
- a faint metallic note
- Odor
- a faint metallic odor
Highlights
- High silica
Analyzed Jan 24, 2025·株式会社メイキョー·Cert no. M24-4285