Sujiyu Onsen, Kokonoe, Oita
Sujiyu Onsen Iwanyu
An open-air rock bath that alternates its men's and women's allocation daily with Yakushiyu. Check the day's arrangement before visiting; the individual spring treatment details and tattoo rule are not published.
Check before bathing
- Opening hours
- 07:00–22:00. Adult admission ¥400. The men's and women's allocation alternates daily with Yakushiyu.
- Tattoo policy
- No formal tattoo policy was confirmed on the current tourism-association pages. Ask locally before visiting.
Spring & water temperature
- Spring-source temperature
- Not published.
- Bathing temperature
- Not published.
- Spring source
- Sujiyu shared spring; an individual source name is not published.
- Spring classification
- Natural hot spring; the current individual facility page does not publish a formal spring classification.
- pH
- Not published.
- Flow rate
- Not published.
- Water handling
- Outdoor rock bath. Current official material does not fully specify dilution, heating, circulation, disinfection or source-flowing status.
Men's and women's access alternates daily with Yakushiyu; the same visitor cannot assume both baths are available to them on the same day.
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.
