Shinsekai, Naniwa Ward, Osaka City
Radium Onsen
A strong pick for an early bath in Shinsekai or an open-air soak with a view of Tsutenkaku. The name “Radium” does not confirm a natural spring.
Check before bathing
- Opening hours
- 06:00–24:00; closed on the second and fourth Thursdays.
- Access
- About a 3-minute walk from Exit 3 of Ebisucho Station. Free parking for 8 cars. The open-air bath looks towards Tsutenkaku.
- Tattoo policy
- The facility's current first-party information does not confirm a tattoo policy. Check with the bathhouse before visiting.
Spring & water temperature
- Spring-source temperature
- Not published; a natural spring has not been confirmed.
- Bathing temperature
- Not published.
- Spring source
- A natural spring has not been confirmed.
- Spring classification
- Neighbourhood public bathhouse. The “Radium” name and carbonated bath are not evidence of a natural radioactive spring.
- pH
- Not published.
- Flow rate
- Not published.
- Water handling
- The listed facilities include a wet sauna, cold bath, herbal bath, carbonated bath and open-air bath. No natural-spring analysis has been confirmed.
An older page lists an essentials set at ¥580, below the 2026 adult basic admission price of ¥600. Because the figures are inconsistent, ¥580 is not presented as the current price.
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.
