Nagato Yumoto Onsen, Nagato, Yamaguchi
Onto
Come for the spring rising naturally beneath the bathing floor and the historic bathhouse, not for a sauna or a large selection of pools. Visitors travelling without a car need to plan around the current substitute bus service on the Mine Line.
Facility photos
Check before bathing
- Opening hours
- Open 10:00–22:00 with no fixed weekly closing day listed by the operator. Adult single entry is ¥990; ages four to 12 are ¥500, and children three and under enter free. A single-entry ticket does not allow re-entry. Same-day passes are ¥1,500 for adults and ¥600 for children, but are not sold from July 21 through August 31. The bath is about one metre deep; there is no dedicated parking.
Spring & water temperature
- Spring-source temperature
- 37°C
- Bathing temperature
- 39°C
- Spring classification
- Alkaline simple hot spring; pH 9.62 on the operator's current page.
- pH
- 9.62
- Water handling
- Natural water rises beneath the bath floor, and the building sits over the spring source. The bath uses a flow-through system rather than assumed circulation; heating can vary with source temperature and season. The operator does not publish full disinfection details.
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.
