Southern Hakkoda–Oirase, Aomori
Tsuta Onsen Ryokan
A memorable day-use bath if you want to experience spring water rising naturally through the floor of the tub, then visit nearby Tsuta-numa. Plan around the gender schedule for Kyuan-no-Yu, the long bus journey from Aomori and the winter closure period.
Check before bathing
- Opening hours
- Day use 10:00–15:00; last reception 14:30. Adult admission ¥1,000; elementary-age children ¥500. Hand towels ¥300; bath-towel rental ¥500. The inn may stop day-use admission early when busy or close a bath on selected dates. Kyuan-no-Yu is women-only 10:00–12:00 and 21:30–09:00 the next day, and men-only 13:00–21:00. Aomori tourism lists seasonal winter closures around November 25–December 23 and January 13 to mid-April; check the inn's annual notice for exact dates.
- Tattoo policy
- No clear tattoo policy was found on the current first-party pages. Confirm with the inn before visiting.
Spring & water temperature
- Spring-source temperature
- 45.4°C for Kyuan-no-Yu when the air temperature was 4.5°C; this is source temperature, not bath temperature.
- Bathing temperature
- Not published.
- Spring source
- Tsuta Onsen springs; the operator describes water rising through the bottom boards of the baths before contact with the air.
- Spring classification
- Kyuan-no-Yu: sodium-calcium sulfate, bicarbonate and chloride spring; hypotonic, neutral and high-temperature.
- pH
- Not published.
- Flow rate
- Not published.
- Water handling
- The operator describes the facility as using naturally rising spring water. Forest spring water is added to adjust the temperature; do not describe the baths as undiluted solely from the natural-floor-source design.
Day-use guests have a short window for Kyuan-no-Yu: women mainly 10:00–12:00 and men 13:00–15:00. Seasonal closure dates vary by year; check the inn's current notice.
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.
