Uchinomaki Onsen, Aso, Kumamoto
Aso Uchinomaki Onsen Yuraku
The most varied of Uchinomaki's town baths, with indoor and outdoor pools, a mist sauna and two private family baths. It works well if you want more than a quick soak, though children cannot use the mist sauna and the current bath temperature is not published.
Check before bathing
- Opening hours
- 13:00–22:00; closed Tuesdays. Public bath ¥500 for adults and ¥250 for children. The mist sauna costs an extra ¥200. Two private family baths are listed at ¥2,000 for 50 minutes or ¥2,300 for 60 minutes.
Spring & water temperature
- Spring-source temperature
- 42.0°C in updated secondary spring data; not a current first-party analysis.
- Bathing temperature
- Not published. A reported bathing impression around 40°C is not a fixed measurement.
- Spring source
- Aso Uchinomaki Onsen Yuraku; the current association page does not list a source name.
- Spring classification
- Sodium-calcium-magnesium sulfate spring; hypotonic, neutral and high-temperature, according to updated secondary spring data.
- pH
- Not published.
- Flow rate
- 93.8 L/min in updated secondary spring data; not a current first-party figure.
- Water handling
- Current spring and facility listings describe the water as source-flowing. The operator has not published complete pool-by-pool details on dilution, heating or disinfection.
Children may not use the mist sauna. Older listings still show ¥400; the current association page lists ¥500 for adults.
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.
