Yufuin Onsen, Yufu, Oita
Mori-no-Yu Yufuin Yasuha
A blue-water spring bath with a small indoor public bath and two bookable-by-arrival outdoor private baths. Day use is not reservable, and the dedicated day-use page conflicts with older FAQ hours; use the dedicated page and confirm late visits on the day.
Facility photos
Check before bathing
- Opening hours
- Dedicated day-use page: 09:00–21:00; last admission 20:00. The FAQ still shows older 10:00 opening and 19:00 last admission, and says access may stop early after 18:00. Public indoor bath: adult ¥900, child ¥500, infants free. Private outdoor bath for 50 minutes: ¥2,300 (mountain side) or ¥2,800 (river side); extensions ¥500 per 15 minutes. No advance reservations or time selection for day use.
Spring & water temperature
- Spring-source temperature
- 97.6°C in the analysis dated January 20, 2021, measured at the storage-tank outlet; not a fixed bath temperature.
- Bathing temperature
- Not published.
- Spring source
- Yufuin Yasuha's own blue-water spring; the profile cites the hotel's 2021 analysis sheet.
- Spring classification
- Bicarbonate spring.
- pH
- The same 2021 analysis lists pH 9.3; this is not a fixed bath setting.
- Flow rate
- Not published.
- Water handling
- The hotel confirms source-flowing blue spring water. Day visitors use a small indoor public bath or the mountain-side and river-side private outdoor baths. Full pool-by-pool water-addition, circulation and disinfection details are not published.
The 97.6°C and pH 9.3 figures come from the 2021 analysis, not current pool readings.
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.
