Yukawa, Ito, Shizuoka Prefecture
Asahi-no-Yu Seaside Spa, Ito Marine Town
The most fully equipped day-use option in Ito if you want an early start, sea views, a sauna, amenities or an optional private bath.
Check before bathing
Spring & water temperature
- Spring-source temperature
- 38°C at Yukawa No. 68 spring.
- Bathing temperature
- Fixed temperatures are not published. The central large bath is described only as having a hotter side and a warmer side; the 38°C source temperature is not substituted.
- Spring source
- Yukawa No. 68 spring.
- Spring classification
- Calcium-sodium chloride-sulfate spring.
- pH
- Not published.
- Flow rate
- 170 L/min.
- Water handling
- The facility describes its system as both source-flowing and heat-retaining circulation; it is not classified as 100% pure source flow.
Bathing indications
The facility's spring analysis lists general bathing indications including neuralgia, muscle and joint pain, sensitivity to cold and fatigue. These are Japanese hot-spring indications, not a treatment guarantee.
On 7 September 2026, the facility was not on its listed special-date or regular-closure calendar and was expected to follow normal weekday operations. Children still in diapers should use the facility's baby bath; adults wearing diapers should not bathe. Check for emergency closures on the day. Tattoo policy is not published or confirmed.
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.
