Naka-Yasui, Sakai Ward, Sakai, Osaka
Yasui Onsen
A traditional bathhouse that heats natural groundwater and offers both dry and steam saunas, a radon bath, and hot and lukewarm pools. Its groundwater is not a legally confirmed natural hot spring.
Check before bathing
- Opening hours
- Open 14:00–23:00; closed Mondays. About a 15-minute walk from Sakaihigashi Station or 12 minutes from Shukuin Station; five parking spaces are listed. Osaka's 2026 public-bath rate is ¥600 for adults, ¥200 for elementary-school children and ¥100 for preschool children.
- Tattoo policy
- The reviewed official material does not confirm a tattoo policy; ask the facility directly.
Spring & water temperature
- Spring classification
- Natural groundwater is used, but no analysis confirming a legally classified hot spring or therapeutic spring is published.
- Water handling
- The association describes a general bathhouse using heated natural groundwater.
Tattoo policy was not confirmed in the reviewed official material.
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.
