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Oji Onsen
4.4★ · 72 Google ratings · Oita, Oita · 王子温泉
✓ Day visitors✓ Kakenagashi
Before you go
Can you bathe here?
Day visitors
✓ YesFrom the facility's listing
Hours
16:00–21:00From the facility's listing
Closed
SaturdayWeekly closing days from the listing
Tattoos
? Call aheadNo policy stated in the 40 recent reviews we read
Price
¥430 adultConfirmed by recent visitor reports
How we know this
- Day visitors: Listed as a sento (public bathhouse): a bath for day visitors by definition. No visitor review states otherwise. · from the listing category
- Price: Adult admission is 430 yen, raised from 380 yen in February 2023. · 3 visitors, Feb 2025 – May 2026
The bath
What you’ll find
Oji Onsen is a century-old public bathhouse (sento) in Oita City with genuine source-fed, unheated sodium bicarbonate 'mall onsen' water; wooden lockers often can't be locked and soap/shampoo are usually not provided.
Spring water
Spring type
sodium bicarbonateConfirmed by recent visitor reports
Source temperature
53°CReported by two visitors
pH
pH 8.57Confirmed by recent visitor reports
Free-flowing (kakenagashi)
✓ FullFresh spring water flows continuously through the bath
How we know this
- Spring type: The spring is classified as a sodium bicarbonate type, locally known as a dark 'mall onsen' (moor spring). · 3 visitors, Mar 2025 – Jun 2026
- Source temperature: Source temperature was reported as 50°C in 2026 and 53°C in 2025. · 2 visitors, Aug 2025 – Jun 2026
- pH: pH was measured between 8.3 and 8.6 across different visits. · 3 visitors, Feb 2025 – Jun 2026
- Free-flowing (kakenagashi): Multiple visitors describe the water as genuine source-fed (kakenagashi) hot spring. · 3 visitors, Mar 2024 – May 2026
Practical
What you need
Towels
Bring your ownOne review advises bringing your own towel while another says towels could be borrowed for free.Reported by two visitors
Lockers
Lockers, but no locksThe old wooden lockers are difficult or impossible to lock, so valuables are effectively unsecured.Confirmed by recent visitor reports
Hair dryer
✓ YesConfirmed by recent visitor reports
Facilities
Rest area
✓ YesReported by one visitor
How we know this
- Towels: One review advises bringing your own towel while another says towels could be borrowed for free. · 2 visitors, Mar 2022 – Feb 2025
- Lockers: The old wooden lockers are difficult or impossible to lock, so valuables are effectively unsecured. · 3 visitors, Jan 2020 – May 2026
- Hair dryer: Hair dryers are available for use in the changing area. · 3 visitors, Mar 2024 – Aug 2025
- Rest area: One review describes a bench and rest area near the changing room. · 1 visitor, Feb 2025
Timing
When to go
Weekly hours
| Day | Hours |
|---|---|
| Monday | 16:00–21:00 |
| Tuesday | 16:00–21:00 |
| Wednesday | 16:00–21:00 |
| Thursday | 16:00–21:00 |
| Friday | 16:00–21:00 |
| Saturday | Closed |
| Sunday | 16:00–21:00 |
Closed Saturday.
Getting there
How to get there
Nearest station
Nishi-Ōita · JR KyushuAbout 14 min on foot, 1.1 km in a straight line
Address
8-27 Oji Nakamachi, Oita, 870-0006From the facility's listing
Show a driver
王子温泉The name in Japanese, for a taxi or at the counter
Phone
+8197-532-8438Japanese-speaking. For tattoos or private baths a call is the only sure answer
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Questions
Common questions
Can I visit Oji Onsen without staying overnight?
Listed as a sento (public bathhouse): a bath for day visitors by definition. No visitor review states otherwise.
How much does Oji Onsen cost?
Adult admission is 430 yen, raised from 380 yen in February 2023.
Is the water free-flowing spring water?
Multiple visitors describe the water as genuine source-fed (kakenagashi) hot spring.
