Shima Onsen, Nakanojo, Gunma Prefecture
Shima Seiryu-no-Yu Municipal Bath
A useful benchmark in Shima Onsen if you want a low-cost open-air bath and a place to rest. Check the temporarily shortened hours and any extra maintenance closures before setting out.
Check before bathing
- Opening hours
- Temporarily 10:00–17:00; last admission 16:30. The fourth Wednesday is the regular closing day, with additional monthly maintenance closures possible.
- Tattoo policy
- Not permitted under the current visitor guidance.
Spring & water temperature
- Spring-source temperature
- Not published. Shima Onsen's regional range of 40–80°C is not assigned to this bathhouse.
- Bathing temperature
- Not published.
- Spring source
- The spring used at Shima Seiryu-no-Yu; the current official page does not publish its individual source name.
- Spring classification
- Sodium-calcium chloride-sulfate spring.
- pH
- Not published.
- Flow rate
- Not published.
- Water handling
- Nakanojo Town lists the facility as a natural-spring day bath, with two indoor and two open-air pools. Current official text does not publish water addition, heating, circulation or disinfection conditions for each pool.
Bathing indications
Nakanojo Town lists general bathing indications such as rheumatism, women's health conditions, chronic skin conditions and digestive complaints. These are not treatment guarantees.
Pool-specific water treatment is not published in the current official text.
The two-hour admission is ¥600 for adults. Tattooed guests may not bathe under the current visitor guidance.
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.
