Obama Onsen, Unzen, Nagasaki
YUASOBI
All six rooms are private, and each combines a hot-spring bath with a steam sauna and cold plunge. The one-hour plan starts at ¥3,000 for up to four people, making it a practical pick for a shared private-bath session; it is not an open-air sea-view bath.
Facility photos
Check before bathing
- Opening hours
- 10:00–23:00; last reservation 22:00. Same-day bathing and reservations are available. One hour from ¥3,000 for up to four people; two hours from ¥5,000 for up to four. Each additional guest over four is ¥500. Rates and availability can change; confirm before booking.
- Tattoo policy
- The current official page does not state a tattoo policy. Check with the facility before booking.
Spring & water temperature
- Spring-source temperature
- Not published. The area's representative 105°C figure should not be attributed to this facility.
- Bathing temperature
- Not published.
- Spring source
- Obama Onsen; an individual source name has not been published.
- Spring classification
- Chloride spring, based on the Obama Onsen association's regional classification.
- pH
- Not published.
- Flow rate
- Not published.
- Water handling
- Each of the six private baths fills with Obama Onsen water when a coin is inserted. All rooms have a steam sauna and cold plunge. Pool-by-pool details on dilution, heating, circulation and disinfection are not fully published.
Bathing indications
The Obama Onsen association lists general bathing indications for the area's chloride springs. They are not a facility-specific treatment claim.
The steam sauna and cold plunge involve a sharp temperature contrast. Avoid pushing yourself if unwell or after drinking; anyone with cardiovascular concerns should take particular care.
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.
