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Kiyomon-yu Hot Spring

きよもん湯きよもんゆ

Public Bathhouse
Kansai·Wakayama

Day Use

Yes
12:00–23:30
¥500

+1000 private bath

Bathing & Water

Natural onsen water

Uses natural hot spring water

Indoor BathYes

Enclosed indoor bathing area

Capabilities

Private BathYes

Private bath available for day-use visitors or hotel guests to reserve

Policies & Services

WashingYes

Shower, wash stations, soap and shampoo provided

喜代門湯1号

Kiyomon-yu Spring No. 1

Operated by · 株式会社 きよもん

Simple
Color
colorless and transparent
Taste
very faint sulfur taste
Odor
odorless

Sodium Carbonate-Chloride spring

pH 9.6AlkalineHigh silicaStrongly alkaline
Composition fingerprint0.2 g/kg dissolved · Hypotonic
Na⁺93
CO₃²⁻37
Cl⁻30
F⁻16
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 pH 9.6 alkaline simple thermal water from Yugawa in Wakayama. Total dissolved solids are light at 195 mg/kg, but the strong alkalinity gives a pronounced slippery feel on the skin — squarely in Japan's beauty-water family. Metasilicic acid at 55.6 mg/kg leaves a thin silica film for noticeably smoother skin. At the wellhead the water carries a very faint sulfur note on the tongue.

Sampled at wellhead·Analyzed Jun 12, 2019·一般社団法人 和歌山県薬剤師会 医薬品・公衆衛生検査センター·Cert no. 第E1905208号

Explore the water

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Sergey M
9 months ago

649. Kiyomon-yu Hot Spring, Nachikatsuura, Wakayama Onsen for 500 yen. For an additional 1000 yen there are private baths (didn't take one). Operating hours from 12:00 to 23:30. They used to sell the 12 Onsen of Wakayama stamp but stopped participating. Bath photo from the internet matches. Indoor bath with clear water, temperature 40. Breathing inside is fine. 04.11.2025

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Last updated June 29, 2026