Honjo, Chuo Ward, Kumamoto City
Yulax
A large, around-the-clock spa with three sauna styles for each gender and a notably deep men's plunge pool. The building stays open overnight, but bathing is not available during the 08:00–10:00 cleaning break; Tattoo access was not confirmed.
Check before bathing
- Opening hours
- The facility is open 24 hours. Baths and saunas are available 10:00–08:00 the following morning, with a full closure from 08:00–10:00 for cleaning. Bath-only admission: weekdays adult ¥900, weekends and holidays ¥1,000; child ¥300. First-floor payment is cash only. The second-floor lounge and overnight stay cost extra; a late-night surcharge applies to stays spanning 01:00–05:00. Holiday periods may have special rates. The operator has announced a maintenance closure in mid-to-late November 2026; check for confirmed dates.
Spring & water temperature
- Spring-source temperature
- Not published.
- Bathing temperature
- Not published.
- Spring source
- The individual source name is not published.
- Spring classification
- Calcium-sodium chloride spring.
- pH
- Not published.
- Flow rate
- Not published.
- Water handling
- The operator describes it as 100% natural spring water without added water. Current pages do not publish source temperature, pH, yield or complete heating, circulation and disinfection details for each pool.
Bathing indications
The operator describes chloride-spring water as slow to cool after bathing. This is a general spring characteristic, not a promise of a medical effect.
The facility's current sauna page lists three sauna types for each gender, with hourly aufguss sessions from 12:00 to 01:00. A separate current page lists the men's plunge pool at 171 cm deep.
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.
