Naruko Onsen, Osaki, Miyagi
Waseda Sajikiyu
A public bath with an optional private open-air bath in the Naruko Onsen area. A source-related maintenance closure was scheduled for September 3–10, 2026, with a possible extension; verify that it has reopened before setting out.
Check before bathing
- Opening hours
- Regular hours are 09:00–21:30; last admission 21:00. Adult admission ¥660. The private open-air bath is usually booked for 50 minutes at ¥1,100, in addition to the bathing fee. The September 2026 closure may have been extended, so confirm current access.
Spring & water temperature
- Spring-source temperature
- Not published.
- Bathing temperature
- Not published.
- Spring source
- Waseda bath source.
- Spring classification
- Natural hot spring; the current profile refers to Naruko's official spring table for classification details.
- pH
- 6.6.
- Water handling
- Public bath and private open-air bath. The reviewed material does not publish a fixed current source temperature or a pool-specific treatment breakdown.
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.
