Hotel Kawakyu

ホテル川久ホテルがわひさ

Lodging
Kansai·Wakayama

Day Use

Yes

Bathing & Water

OnsenYes

Uses natural hot spring water

3源泉の混合泉(垣谷二号源泉・垣谷三号源泉・甘露の湯)

Three-spring blend (Kakitani #2, Kakitani #3, Kanro-no-yu)

Operated by · 東白浜温泉土地株式会社

Mixed source

Sampled at mixing tank
Chloride
Classification

Sodium Chloride spring

A sodium chloride spring — salty, heat-retaining water at 56.5 °C from the wellhead, with the faint rotten-egg whisper of hydrogen sulfide on the nose. Richly mineralized at 13.08 g/kg of dissolved solids, it leaves a clear mineral film on the skin. The cert also reports a generous 102.5 mg/kg of metasilicic acid, putting it in the Japanese 'beauty-water' family with the kind of silica film that makes skin feel noticeably smoother afterwards.

pH
6.90
Neutral
Source temperature
56.5°C
Hot
Tonicity
13.08g/kg
Hypertonic
Free H₂S
0.20mg/kg
Low
Color
colorless and clear
Taste
salty
Odor
faint hydrogen sulfide note
Highlights
  • High silica

Analyzed Jan 18, 2024·一般社団法人 和歌山県薬剤師会 医薬品・公衆衛生検査センター·Cert no. 第E2401143号

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SM
Sergey M
4 months ago

681. Hotel Kawakyu, Shirahama, Wakayama ★★ Luxury onsen. Visited in the morning for higaeri massage + onsen. Booked the first slot in advance on the website; booking slots are from 09:00 to 19:00. The massage was solid but more relaxing and light. After the massage you can go to the onsen. When choosing a slot, note that baths are closed from 10:30 to 13:00. There is a gender rotation for baths. 1. Indoor bath area. Right in the bath area there's a fireplace, seating, drinking water, and a premium sauna drink for 500 yen. The area looks stylish. Breathing inside is fine. 1.1. Bath with clear water with fine sparse white limestone particles. Has a slippery/soapy feel. Temperature around 41.5. 1.2. Silk bath, temperature around 40.5. 1.3. Lying-down area with clear water, temperature around 41.5. 1.4. Sauna. 1.5. Cold bath. 2. Semi-open area. Great view through an opening to the bay and the other shore. The view from the infinity bath, but it runs into the glass. Clear water with fine white limestone, slippery/soapy feel. Temperature around 42. Really great place, recommended for a visit. If you have more time and book the first early slot, I think you could ask to try both bath areas during the gender rotation in one visit. 10.11.2025