Central Obama Onsen, Unzen, Nagasaki
Ryokan Yunoka
A strong pick if you want a private bath with a view: the ryokan offers indoor and rooftop private baths alongside a public bath. Its operator describes the water as naturally flowing and undiluted, then naturally cooled before bathing. Day-use access starts at 15:00 on the current facility page; an older association listing starts earlier.
Check before bathing
- Opening hours
- Day-use bathing 15:00–21:00 according to the current operator page; an older association page lists 13:00, so confirm before an early-afternoon visit. Public bath ¥500. Private baths are ¥1,000 for 50 minutes; availability and bath type should be checked with the ryokan.
- Access
- Across from the Nishitōzanguchi bus stop, near the Obama Onsen waterfront footbath.
- Tattoo policy
- No current tattoo policy was found on the official pages.
Spring & water temperature
- Spring-source temperature
- No facility-specific figure is published. The regional 105°C figure is not Yunoka's individual source temperature.
- Bathing temperature
- About 40–41°C according to Unzen tourism information; this is an adjustment range, not a fixed measurement for every pool and time.
- Spring source
- The ryokan's own spring; an individual source name is not published.
- Spring classification
- Sodium-chloride spring.
- pH
- Not published.
- Flow rate
- Not published.
- Water handling
- The operator describes a naturally flowing spring with no added water. Hot water is cooled in a holding tank before being adjusted for bathing; the reported bathing range is about 40–41°C. The full treatment details for every pool are not published.
The 40–41°C figure is not a guarantee that every bath stays at that temperature.
How to read a bath profile
Spring-source temperature and actual bathing temperature are kept separate. Each score is shown independently for comparison rather than collapsed into one overall score.
