Ikaho Onsen, Shibukawa, Gunma
Ikaho Open-Air Bath
A natural outdoor soak near the hot-spring source, best paired with the nearby Kajika Bridge and source-viewing spots. Come for the Golden Spring and the setting rather than a full-service spa: there is no washing area, and the bath has not confirmed a tattoo policy.
Check before bathing
- Opening hours
- April–September 09:00–18:00; October–March 10:00–18:00. Last admission 17:30. Closed on the first and third Thursdays except public holidays; open daily in August. Adult admission ¥600. Children under one year are not admitted.
- Tattoo policy
- No formal tattoo rule was found on the current city or tourism-association pages checked in September 2026. Ask the facility before visiting.
Spring & water temperature
- Spring-source temperature
- Not published for this facility. The source area's temperature is not substituted here.
- Bathing temperature
- Not published.
- Spring source
- Ikaho Onsen's Golden Spring.
- Spring classification
- Calcium-sodium sulfate, bicarbonate and chloride spring; neutral and hypotonic.
- pH
- Not published.
- Flow rate
- Not published for the facility.
- Water handling
- The Shibukawa-Ikaho Onsen Tourism Association says the bath uses the Golden Spring as source-flowing water. This does not mean the source area's reported yield is the bath's own supply volume.
There is no washing area. Towels are available for ¥400 and bath towels for ¥1,200.
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.
