OkutsuSo
名泉鍵湯 奥津荘
A century-old ryokan with baths built over a living riverbed spring
Day Use
YesLast entry for day-use bathing is 14:00, half an hour before closing at 14:30. A separate evening bath-and-dinner day-use plan runs from 17:00 to 21:00, by advance booking. The baths also close on occasional maintenance days at irregular times through the year.
Children age 3 and up pay a lower day-use rate than adults, who are counted from junior-high age. The reservation-only private baths, Izumi-no-yu and Kawa-no-yu (泉の湯・川の湯), cost extra beyond the entry fee, 60 minutes each, at a rate that varies by day of the week and is confirmed when you book.
Bathing & Water
Uses natural hot spring water
Open-air outdoor bath
The shared baths are indoor only. Two detached-room categories have their own private outdoor onsen bath (see the room-onsen feature).
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
Private onsen bath in guest rooms, for overnight guests only
Shared bathing area for all genders
Policies & Services
Allows entry with visible tattoos
Tattooed guests are welcome to stay. Only the shared indoor bath may exclude a visible tattoo; the private baths remain open to everyone.
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
On-site or nearby parking available
Views
River
MountainsAbout
Okutsuso sits on the Yoshii river at Okutsu Onsen. Its two shared baths, Kagiyu and Tateyu (鍵湯・立湯), are built right over the riverbed rock, and the alkaline spring rises straight up through the floor of the tub. Both are indoor only, and the men's and women's sides swap through the day. Two more baths, Izumi-no-yu and Kawa-no-yu (泉の湯・川の湯), are private and reservation-only, bookable by day visitors as well as overnight guests; one of them looks out over the river and the hillside. Two of the detached-building room categories add their own private open-air bath. The water itself is soft, alkaline, and smooth on the skin. The building dates to 1927, a wooden ryokan now a nationally registered tangible cultural property, and it still feels that way inside: quiet corridors, old glass, a small onsen town outside the door.
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Last updated September 29, 2026