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Hotel Kawakyu

ホテル川久ホテルかわきゅう

Lodging
Kansai·Wakayama

Day Use

Yes
09:00–19:00

massage reservation + onsen

¥2,000

Adult ¥2,000, elementary school child ¥1,000, bath and face towel included. A separate ¥150 per-person onsen tax applies.

Bathing & Water

Natural onsen water

Uses natural hot spring water

Outdoor BathYes

Open-air outdoor bath

Indoor BathYes

Enclosed indoor bathing area

SaunaYes

Dry heat sauna room

Cold BathYes

Cold water plunge bath, typically used after sauna

Capabilities

Private BathNo

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

Room OnsenYes

Private onsen bath in guest rooms, for overnight guests only

Mixed BathingNo

Shared bathing area for all genders

Policies & Services

DiningYes

Restaurant or dining open to visitors (not just hotel meal plans)

WashingYes

Shower, wash stations, soap and shampoo provided

TowelsYes

Towels available to rent or borrow

Rest AreaYes

Relaxation space for after bathing

ParkingYes

On-site or nearby parking available

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

Chloride
Color
colorless and clear
Taste
salty
Odor
faint hydrogen sulfide note

Sodium Chloride spring

pH 6.9NeutralHot source · 57°CHigh silica
Composition fingerprint13.1 g/kg dissolved · Hypertonic
Na⁺82
Cl⁻78
HCO₃⁻15
CationsAnions
Sodium Na⁺
salt's cation — pairs with chloride to make the water salty.
Chloride Cl⁻
table-salt anion — coats the skin and holds heat in.
Known good for
  • Warmingcold sensitivity
  • Aches & jointsstiff shoulders
  • Smooth skindry, rough skin

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.

Sampled at mixing tank·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

Explore the water

Views

Sea

Programs

About

Two large baths, Yukyu no Mori (悠久の森) on one floor and Royal Spa (ロイヤルスパ) on the other, swap between them each day. Yukyu no Mori's indoor bath is built from koyamaki (高野槙), a wood considered sacred on Koyasan (高野山), next to an outdoor bath that mixes Japanese and Western style. Royal Spa has a sauna with self-serve loyly, a reclining bath, and a lounge looking out over Tanabe Bay. The water itself is a soft, faintly salty spring. A handful of the top suites go further, with their own private open-air onsen bath on a terrace facing the sea. Kawakyu is as much a building to look at as a place to bathe: it's a bubble-era luxury hotel built with a deliberately over-the-top, art-museum feel, and its gold-leafed entrance hall ceiling holds a Guinness World Record. Guests wander the lobby like a small gallery before heading up to soak.

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Reserve or check availability on a booking site.

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1 review

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Sergey M
9 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

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Last updated July 22, 2026