Shimonaguri, Hanno, Saitama Prefecture
Sawarabi-no-Yu
A good two-to-three-hour natural-spring stop after Lake Naguri, Mount Bonoore, camping or cycling. Check the latest temporary-closure notice before making the trip; the facility posted one on 7 September 2026, but its exact closure period was not confirmed in the profile.
Check before bathing
- Opening hours
- Normally 10:00–18:00 on a three-hour ticket; adult admission is ¥800. Hours may extend to 19:00 during Golden Week and summer holidays. Closed on the first and third Wednesdays, with holiday exceptions. A temporary-closure notice was posted on 7 September 2026; confirm whether the facility is open before travelling.
Spring & water temperature
- Spring-source temperature
- 16.8°C, according to the facility's current about and sustainability pages.
- Bathing temperature
- The facility heats the 16.8°C cool spring water for bathing but does not publish fixed pool temperatures.
- Spring source
- Natural spring used by Sawarabi-no-Yu; the current main pages do not name the well.
- Spring classification
- Alkaline simple sulfur cool spring.
- pH
- Not published in current main official information.
- Flow rate
- Not published in current main official information.
- Water handling
- The source is 16.8°C, and the facility says it heats the water with Nishikawa timber pellets. Indoor and outdoor baths, jet and bubble features, and a steam sauna are listed. Full pool-by-pool details for water addition, circulation and disinfection are not published; the whole facility is not described as source-flowing.
- Analysis date
- 2026
Bathing indications
The facility lists general bathing indications. This is hot-spring reference information, not a guarantee that bathing treats a condition.
Check the latest closure notice before travelling. The 7 September 2026 notice did not have a safely confirmed closure period in the profile.
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.
