Yudanaka Onsen, Yamanouchi, Nagano Prefecture
Wata-no-Yu, Yudanaka Onsen
Wata-no-Yu is now included in Yudanaka's 2026 public-bath circuit. It suits visitors interested in local bathhouse culture, but its individual spring data should not be confused with averages for the wider Yudanaka area.
Check before bathing
- Opening hours
- Use is limited to holders of the 2026 Yudanaka Onsen public-bath pass. Wata-no-Yu is open to pass holders 10:00–17:00; it may be unavailable on bath-cleansing days.
- Tattoo policy
- The current first-party information does not confirm a tattoo policy for this bathhouse. Check before visiting.
Spring & water temperature
- Spring-source temperature
- Not published. Yamanouchi Town lists 65–93°C for Yudanaka Onsen overall; those figures are not assigned to this bathhouse.
- Bathing temperature
- Not published.
- Spring source
- Yudanaka Onsen; the individual source used at Wata-no-Yu is not published.
- Spring classification
- Yudanaka's area-wide spring types include chloride and sulfate springs. A current chemical classification for this individual bathhouse is not published, so area averages are not treated as its analysis certificate.
- pH
- Not published.
- Flow rate
- Not published.
- Water handling
- The 2026 official public-bath pass confirms that pass holders can use Wata-no-Yu. Current pass information does not specify water addition, heating, circulation, disinfection or source-flow conditions for this bathhouse.
Bathing indications
Yamanouchi Town lists general bathing indications for Yudanaka Onsen as a whole. No individual treatment claim is made for Wata-no-Yu.
Bath-specific water treatment and spring details are not published on the current pass page.
The pass costs ¥1,800 for adults and ¥1,000 for children and covers Wata-no-Yu, Yudanaka Ōyu and Kaede-no-Yu. This is the price of the pass, not a single-entry fare for Wata-no-Yu.
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.
