神通温泉
Jinzu OnsenOperated by · 株式会社神通温泉
湯
Simple
- Color
- colorless and clear
- Taste
- tasteless
- Odor
- faint hydrogen-sulfide note
Sodium HSiO3-Carbonate spring
pH 9.6AlkalineCold mineral source · 21°CStrongly alkalineCold mineral
Composition fingerprint0.3 g/kg dissolved · Hypotonic
Na⁺97
HSiO₃⁻43
CO₃²⁻27
◀ CationsAnions ▶
- Sodium Na⁺
- salt's cation — pairs with chloride to make the water salty.
Known good for
- Smooth skindry, rough skin
- Recoveryfatigue, stress
A cold-mineral spring (20.6 °C) drawn from beneath Kinokawa, Wakayama, where sodium leads and fluoride, metaborate, and total sulfur each push the chemistry above the Hot Spring Act's qualifying thresholds. The water is strongly alkaline at pH 9.6 — it carries a faint H₂S note at the wellhead and the classic slippery 'beauty-water' feel of high-pH springs. Mineralization is light (0.25 g/kg total solids), and the source is heated for bathing. It does not meet the stricter 'therapeutic spring' bar, but the bath is a stop on the Kii-Izumi onsen pilgrimage circuit.
Sampled at wellhead·Analyzed May 29, 2018·和歌山県環境衛生研究センター·Cert no. 温泉第1084号
