Sumatakyo, Kawanehon, Shizuoka Prefecture
Bijozukuri-no-Yu Outdoor Bath
A remote outdoor bath that works well after the Yume-no-Tsuribashi walk, not a full-service spa. Its weekly and winter schedule is narrow, so check the calendar before setting out.
Facility photos
Check before bathing
- Opening hours
- The town lists Monday, Friday, Saturday, Sunday and holidays, 10:00–17:30; last admission 17:00. Closed Tuesday through Thursday. In winter, it opens on Sundays only.
- Access
- Through 11 December 2026, many Sumatakyo bus services terminate at the onsen entrance. Check the current route and timetable before travelling.
Spring & water temperature
- Spring-source temperature
- Not published.
- Bathing temperature
- No fixed temperature is published.
- Spring source
- Sumatakyo spring, conveyed roughly 5 km; the individual well is not named.
- Spring classification
- Simple sulfur spring with hydrogen sulfide.
- pH
- 9.1.
- Flow rate
- Not published.
- Water handling
- The town describes the outdoor bath as source-flowing and heated. Other treatment details, including whether water is added or disinfected, are not published.
Bathing indications
Kawanehon describes the water as leaving the skin feeling smooth. This is a sensory description, not a medical or cosmetic treatment claim.
The bath is closed Tuesday–Thursday and has Sunday-only opening in winter. Adult admission is ¥600 and child admission ¥300. Check seasonal hours and transport before travelling.
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.
