Unzen, Nagasaki Prefecture
Unzen Yoka-yu
A source-flowing sulfur bath with both public bathing and six family-bath rooms. It is a practical choice near the Unzen hot-spring district, though later family-bath sessions can be awkward if you rely on the bus.
Check before bathing
- Opening hours
- Public bath 10:00–21:00; family baths 10:00–19:45. The Unzen tourism bureau lists Thursday as the closing day. Public admission: adults ¥500, members ¥400 and children ¥250. Family bath: ¥1,300 per room per hour plus admission of ¥550 per adult and ¥250 per child. The tourism bureau still lists ¥1,500 for the room; the facility's current price page is used here.
- Access
- About a 3-minute walk from Kojigoku Iriguchi bus stop; parking is available.
- Tattoo policy
- The current facility text does not confirm a tattoo rule for public or family baths. A private room is not automatic permission; ask before visiting.
Spring & water temperature
- Spring-source temperature
- 41.7°C in the operator's source data; this is not a fixed bath temperature.
- Bathing temperature
- Not published.
- Spring source
- Yusato source.
- Spring classification
- Simple sulfur spring; low-salinity and acidic.
- pH
- 2.3.
- Flow rate
- Not published.
- Water handling
- The operator describes the day-use baths as 100% source-flowing. Complete water-addition, heating, circulation and disinfection details for each family-bath room are not published.
The operator lists bathing contraindications associated with acidic sulfur springs. If you have sensitive skin or mucous membranes, photosensitivity, a chronic condition or feel unwell, consult a medical professional before bathing.
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.
