Kaichoen
海潮園かいちょうえん
Salty spring baths in Kaike onsen's oldest ryokan
Day Use
YesDay bathing runs from 15:00 to 20:30, with last entry at 20:30, and the bath must be vacated by 21:00.
Flat 500 yen for every age, from infants to adults; the private family bath isn't included with a day-use visit.
Bathing & Water
Uses natural hot spring water
Open-air outdoor bath
Enclosed indoor bathing area
Bathing Arrangements
A private bath you can reserve for yourself or your group
Day visitors can book the private bath, not only overnight guests
Shared bathing area for all genders
Policies & Services
Welcomes children and families
A restaurant or dining room open to visitors, not only meals for overnight guests
Shower, wash stations, soap and shampoo provided
Towels to rent or borrow at the desk
On-site or nearby parking available
About
Kaichoen keeps three baths on the same salty spring. An outdoor rock bath from the Taisho era, said to be the oldest rotenburo in Kaike onsen, was renovated as an open-air bath in 2001 and adjoins Hama-no-yu (浜の湯). Sango-yu (珊瑚湯), the indoor bath, is named for a piece of coral a former owner's boat once hauled up off Hagi, in Yamaguchi, and it still sits at the tap as a good-luck charm. A private family bath is free for overnight guests, with a baby bath for a first family dip. The men's and women's sides swap each morning and night, so a stay covers both, while day-use visitors are assigned one side and don't get the private bath. The water is salty enough to taste, said locally to rise from a spring close to the sea, and it leaves skin feeling smooth. The ryokan has stood since 1962 and says it occupies the oldest building among Kaike onsen's ryokan, a small tatami-floored inn whose earlier owner was close with Showa-era writers, including the novelist Nosaka Akiyuki, and it still keeps their manuscripts on display through the halls.
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Last updated September 29, 2026