Right Onsen › Oita › Taketa
Ganiyu
4.0★ · 435 Google ratings · Taketa, Oita · ガニ湯
✓ Natural hot-spring water✓ Free-flowing source water✓ Outdoor bath
Before you go
Can you bathe here?
Day visitors
✓ YesVisitors across 2025-2026 report this is a free, always-open riverside bath with no admission process.stated by 3 visitors · Oct 2025 – Jul 2026
Hours
00:00–24:00from the facility listing
Price
FreeMultiple reviewers from 2025 to 2026 confirm entry is free of charge.stated by 3 visitors · Oct 2025 – Jul 2026
Bathing arrangement
Mixed bathingReviews from 2025-2026 describe the bath as mixed-gender with no separation.stated by 3 visitors · Oct 2025 – Jul 2026
Tattoos
Not known · call aheadno policy stated in the 42 recent reviews we read or on the facility's website
Watch out
Bath temperature
Bathers in 2026 measured or estimated water temperature between about 35 and 38°C, generally on the lukewarm side.
stated by 3 visitors · Jan 2026 – May 2026Bathing arrangement
Reviews from 2025-2026 describe the bath as mixed-gender with no separation.
stated by 3 visitors · Oct 2025 – Jul 2026Day visitors
Visitors across 2025-2026 report this is a free, always-open riverside bath with no admission process.
stated by 3 visitors · Oct 2025 – Jul 2026The bath
What you’ll find
Ganiyu is a free, 24-hour open-air mixed-bathing hot spring set directly in a riverbed in Nagayu Onsen, with no walls, no dedicated changing room, and water that is usually only lukewarm; bathers are fully visible to passersby.
Outdoor bath
✓ YesThis is an entirely open-air pool set in a riverbed with no roof or enclosure.stated by 10 visitors · Oct 2025 – Aug 2026
View
RiverThe bath sits directly in the river channel, so the surrounding view is of the riverbed and banks.stated by 3 visitors · Oct 2025 – Aug 2026
The water
Free-flowing (kakenagashi)
✓ YesOne 2025 review calls it a source-fed flow-through bath, while a 2021/2026 review notes the water is now piped in and no longer carbonated, suggesting a possible change in supply.stated by 2 visitors · Oct 2025 – Jul 2026
Spring type
Magnesium-sodium-calcium hydrogen carbonate springReviewers cite the posted spring analysis as a magnesium-sodium-calcium hydrogen carbonate spring.stated by 2 visitors · Jul 2026
Bath temperature
36°CBathers in 2026 measured or estimated water temperature between about 35 and 38°C, generally on the lukewarm side.stated by 3 visitors · Jan 2026 – May 2026
Timing
When to go
Quietest Thursday around 3:00; busiest Sunday around 13:00. Measured by Google over past visits, not a forecast.
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Quiet Busy
| Day | Hours |
|---|---|
| Monday | 00:00–24:00 |
| Tuesday | 00:00–24:00 |
| Wednesday | 00:00–24:00 |
| Thursday | 00:00–24:00 |
| Friday | 00:00–24:00 |
| Saturday | 00:00–24:00 |
| Sunday | 00:00–24:00 |
Practical
Plan your visit
📍 Naoirimachi Oaza Nagayu, Taketa, Oita 878-0402
🚃 Asaji station, 8.6 km
📞 +81974-64-1400
📋 Show at the counter: ガニ湯
Nearby
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