Obama Marina, Obama Onsen, Unzen, Nagasaki
Nami-no-Yu Akane Seaside Open-Air Bath
A private open-air bath set over the sea, with a view that is the main reason to come. It is weather- and tide-dependent: rough seas, high water or other unsafe conditions can stop use, so check before travelling. The facility has not published a full water-treatment breakdown or a tattoo policy.
Facility photos
Check before bathing
- Opening hours
- 10:00–23:00; last reception 22:00. Irregular closing days. A 50-minute session costs ¥3,000 for 1–4 people, plus ¥500 for each additional person from the fifth onward.
- Access
- Obama Marina 20. Nishitōzanguchi bus stop is about a 3-minute walk; the Obama bus stop is about 9 minutes on foot.
- Tattoo policy
- No current tattoo policy was found on the official pages. Confirm with the operator.
Spring & water temperature
- Spring-source temperature
- Not published. The regional 105°C figure is not a facility-specific value.
- Bathing temperature
- Not published.
- Spring source
- Obama Onsen; the individual source name is not published.
- Spring classification
- Sodium-chloride spring.
- pH
- Not published.
- Flow rate
- Not published.
- Water handling
- Obama Onsen water is supplied. The facility has not published details on dilution, heating, circulation or disinfection.
The open-air bath may close when wind, waves, high tide or other weather conditions make use unsafe.
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.
