Bentencho, Minato Ward, Osaka
Solaniwa Onsen Osaka Bay Tower
Worth setting aside half a day if you plan to use the garden, shared lounge or stone spa as well as the baths. For a quick soak, the date-based admission price can feel steep.
Check before bathing
- Opening hours
- Day-use admission 11:00–23:00; the large public baths close at 22:30. Last admission 22:00. Check the facility calendar for maintenance closures and the date-specific A–E ticket price. Admission includes a yukata and towels; stone spa and private baths cost extra.
- Access
- Directly connected to Bentencho Station via Osaka Bay Tower.
- Tattoo policy
- Tattoos must be fully covered with the facility's designated cover stickers and meet its rules. Private-bath eligibility is also limited; check the FAQ before booking.
Spring & water temperature
- Spring-source temperature
- 45.1°C in the official analysis dated August 23, 2019.
- Bathing temperature
- 38–42°C in the same analysis; not a current fixed temperature for every pool.
- Spring source
- Osaka Bay Tower Onsen.
- Spring classification
- Simple hot spring; low-salinity, weakly alkaline and high-temperature.
- pH
- Not provided in the profile material summarized here.
- Water handling
- The facility's analysis sheet covers the source and bath-water temperature range, but does not provide a complete current treatment table for every pool. The baths are not described here as uniformly source-flowing.
Bathing indications
The analysis lists general bathing indications including chronic muscle and joint discomfort, sensitivity to cold and fatigue. This is not a treatment guarantee.
Dated maintenance closures are announced on the official site. The September 9, 2026 closure date has passed; check for newer notices.
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.
