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KYUKAMURA OHKUNOSHIMA

休暇村大久野島

Radium spring baths on Rabbit Island

Lodging
Chugoku·Hiroshima

Day Use

Yes
Mon11:30–17:00
Tue11:30–17:00
Wed11:30–17:00
Thu11:30–17:00
Fri11:30–17:00
Sat11:30–15:00
Sun11:30–15:00
Public holidays11:30–15:00

Last entry is 30 minutes before closing: by 16:30 on weekdays (bath closes 17:00) and by 14:30 on Saturdays, Sundays and holidays (bath closes 15:00).

¥550

Day bathing is 550 yen for adults and 500 yen for children (school age through preschool); kids age 3 and under bathe free. A face towel can be bought for 110 yen, and a bath towel can be rented for 110 yen.

Bathing & Water

Natural onsen water

Uses natural hot spring water

Outdoor BathNo

Open-air outdoor bath

Indoor BathYes

Enclosed indoor bathing area

Bathing Arrangements

Private BathNo

A private bath you can reserve for yourself or your group

Room OnsenNo

Private onsen bath in guest rooms, for overnight guests only

Mixed BathingNo

Shared bathing area for all genders

Policies & Services

KidsYes

Welcomes children and families

DiningYes

A restaurant or dining room open to visitors, not only meals for overnight guests

WashingYes

Shower, wash stations, soap and shampoo provided

TowelsYes

Towels to rent or borrow at the desk

ParkingYes

On-site or nearby parking available

Water treatment

Treated and recirculated(partial disclosure)
from Article 18 disclosure
  • Added water
    Yes
  • Reheated
    Yes
  • Recirculated
    Yes
  • Disinfected
    Yes
    塩素系薬剤
  • Bath additives
    Not disclosed

久野島温泉

Kunoshima Onsen
Radon
+ Simple

Sodium-Calcium Bicarbonate-Chloride spring

Cold mineral source · 20°CCold mineral
Composition fingerprint0.1 g/kg dissolved · Hypotonic
Na⁺51
Ca²⁺41
HCO₃⁻50
Cl⁻21
F⁻18
CationsAnions
Sodium Na⁺
salt's cation — pairs with chloride to make the water salty.
Bicarbonate HCO₃⁻
"soda" — softens skin, leaves it smooth.
Known good for
  • Recoveryfatigue, stress

Kunoshima Onsen on Ookunoshima island — classified as a weakly radioactive simple cold-mineral spring (hypotonic, neutral, cold-mineral). The wellhead emerges at just 19.5 °C, so the water is reheated for bathing rather than served at source temperature. Mineralization is light at 130 mg/kg of dissolved solids, which keeps the feel gentle and unobtrusive on the skin. The classification places it in the radon-spring family, the tradition associated with the so-called hormesis claim, and the certificate flags type-specific indications for gout, rheumatoid arthritis and ankylosing spondylitis.

Analyzed Jun 7, 2016·一般財団法人 広島県環境保健協会·Cert no. 広島県第3号

Explore the water

Views

Sea
Forest

About

Kyukamura Ohkunoshima is the only place to stay on Okunoshima, a small Seto Inland Sea island reached only by ferry and known for its tame wild rabbits. The hotel's two indoor baths, Okutsu-no-yu and Kokutsu-no-yu, both use a mild radium spring. Okutsu-no-yu is the larger of the two, looking out over the palms of the courtyard. Kokutsu-no-yu is smaller and faces west, a good spot to watch the sun set over the islands of the Seto Inland Sea. Day-use bathing is open to non-guests too, and both changing rooms keep kids' bath toys and a baby bed on hand.

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Irina

4 months ago

The only hotel on Rabbit Island (there is also a camping site at the hotel). The onsen has radon water, feels like about 41-42 degrees Celsius, divided into a large and a small bath (the photo shows the small one; the large one looks exactly the same, just bigger and with a view of the forest). The hotel itself is old, but they try their best to make the stay pleasant – excellent buffet breakfast and dinner with sashimi, steaks, etc., very courteous staff, and free island tours (only in Japanese, but very interesting). In summer, the beach and outdoor pool are open, and of course there is an absolutely captivating view of the bay – very beautiful sea, boats sailing between the islands, and you can watch the rabbits from above. The island itself has a very dark history related to various wars Japan participated in, many abandoned sites, an active chemical weapons museum, but the rabbits certainly soften this atmosphere with their cuteness.

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Last updated September 19, 2026