Tsukahara Onsen from Yufuin: How to Reach Kakonoizumi and Plan a Half-Day
Reach Tsukahara Onsen from Yufuin by taxi or limited community bus. Compare public and family baths, then leave time for the crater walk and return ride.
Tsukahara Onsen Kakonoizumi sits on the slopes of Mount Garandake, outside Yufuin’s walkable centre. From Yufuin Station, the facility estimates about 15 minutes by taxi or around 20 minutes by car. That short drive can still shape the day: the local bus is a community service with limited runs, and the family baths are allocated in person rather than by phone reservation.
For a first visit, take a taxi if you have a train to catch later or want to use a private bath. Drivers can go directly to the entrance, while the bus requires you to verify the current Tsukahara route, stop and walking distance before setting out. If you are driving onward to Beppu, Tsukahara works as a stop between Yufuin and the city rather than a detour back through the station.
Getting there without a car
The simplest no-car plan is a taxi from Yufuin Station. Kakonoizumi lists the ride at roughly 15 minutes and publishes contact details for two Yufuin taxi operators on its access page. The fare is metered, not a fixed price quoted by the facility, so allow for traffic and confirm the return pickup before you start bathing. There is no reason to assume a taxi will be waiting at the mountain-side entrance.
Yufu City’s community-bus timetable includes a Tsukahara route, and the city lists a flat fare of ¥200 per ride. Its general U-Bus guidance says services operate on weekdays and stop on Saturdays, Sundays and public holidays, but the Tsukahara route PDF is the place to check which weekdays a particular run operates. This is not the former school bus: the city says the school-bus Tsukahara and Yunohira routes ended on March 31, 2026. The community bus has its own timetable, so do not use an old school-bus schedule or assume that a map label for a facility marks a bus stop.
Before relying on U-Bus, open the city’s current Yufuin-area timetable and follow the link for the Tsukahara route. The master PDF is marked as revised May 1, 2026, while the separately linked Tsukahara route PDF says April 1, 2026.
Both remain linked by the city, but it is unclear which revision controls a particular connection. Check the stop nearest the onsen and the return service for your date with the timetable and, if needed, the city transport office. If a return connection is essential, a taxi is easier to build around.
Three bathing options, with different rules
Kakonoizumi has three separate bath types. The public indoor bath is gender-separated; the public open-air bath is also a shared bathing facility. Neither is a private bath for a couple or family to use together.
| Bath | Published admission | What to know |
|---|---|---|
| Indoor bath | ¥500 per adult; ¥200 per child aged one or older | Gender-separated; use is limited to two hours after reception. |
| Public open-air bath | ¥600 per adult; ¥200 per child aged one or older | A shared, gender-separated bath, not a private outdoor room; two-hour limit. |
| Family bath | ¥2,000 per room for one hour | Four rooms; includes up to two adults and two children aged one or older. No phone reservations; rooms go in reception order. |
For a family bath, the base charge is for the room and its stated group allowance, not ¥2,000 per person. Each additional adult is ¥500 and each additional child is ¥300. The operator does not accept telephone bookings, so arriving early can help, but it cannot guarantee a particular wait. Ask at reception before deciding whether to use the crater walk while you wait.
The family bath is confirmed as private, but the operator lists it separately from the open-air bath and does not describe those four rooms as private outdoor tubs. If bathing together outside is a must, compare options in the Yufuin private open-air bath guide; do not infer that a family bath is outdoors from the word “private.”
The crater walk fits around the bath
The facility’s crater-viewing entrance is about a five-minute uphill walk from reception. Admission is ¥200 for adults and ¥100 for elementary-school children, paid at the facility. The walk is a useful extra if your family bath has a wait, but it is not a substitute for checking the weather or the return ride. In poor conditions or if the route is closed, leave it out and keep the visit to the bath.
The spring is unusually acidic: the operator gives a pH of about 1.5 and says it does not add water, reheat, filter or recirculate the spring. It also tells bathers not to use soap or shampoo in the spring water. This is a focused soak, not a large bathing complex with a wash-and-lounge routine; anyone with sensitive skin should take the facility’s bathing guidance seriously.
A practical half-day plan
For a visit by taxi, go straight to reception and ask about the family-bath queue before paying for the crater walk. If a room is available, bathe first and take the short walk afterwards. If there is a wait, ask how long it is and whether there is enough time for the crater path before committing. Agree on how to call a taxi back while you still have signal and time to spare.
Drivers have more flexibility: visit the crater when conditions are good, bathe afterwards, then continue towards Beppu. The access page lists about 20 minutes from Yufuin Station by car and 35 minutes from Beppu Station; these are estimates, not guaranteed travel times. In winter or poor weather, check road conditions before driving into the highland area.
Opening hours are seasonal, and weather can affect access and outdoor facilities. The operator’s site displays the current hours separately from its price list, so confirm the day’s notice before making a late-afternoon trip. Current bath fees above were checked against the operator’s published rate table on September 28, 2026; the city’s timetable page and route PDF should be checked again for the actual travel date.
If you want more bath choices within Yufuin itself, see the Yufuin day-use onsen guide. For an itinerary that depends on public transport, the Yufuin no-car day-trip guide helps compare stops closer to town.
