Asahi Onsen, Hamada, Shimane
Asahi Onsen Asahiso
Asahiso is an easy-value day bath for drivers on the Hamada Expressway, with a low entry price and a straightforward schedule. Visitors without a car should settle the bus connection first.
Check before bathing
- Opening hours
- Open 09:00–20:00, last admission 19:30. Closed Tuesdays. Admission is ¥500 for adults and ¥200 for elementary-school children. Adults pay ¥400 after completing the facility's free membership registration.
- Tattoo policy
- The current official, city and tourism pages checked do not publish a tattoo rule. Confirm with the facility before visiting.
Spring & water temperature
- Spring-source temperature
- 34.8°C in the tourism association's property-specific data current to March 2025; this is not presented as a 2026 re-analysis
- Bathing temperature
- Not published
- Spring source
- The spring used by Asahiso; the current main pages do not name the individual well
- Spring classification
- Alkaline simple spring
- pH
- 8.5 in the tourism association's property-specific data current to March 2025
- Flow rate
- Not published
- Water handling
- The facility is operating as a natural hot spring. Hamada City's management documents confirm equipment for heating and supplying the water, but current main pages do not publish pool-by-pool details for water addition, circulation, disinfection or free-flowing use.
- Analysis date
- 2026
Bathing indications
The tourism association lists general bathing indications including neuralgia, muscle and joint pain, sensitivity to cold and fatigue. These are not treatment guarantees.
Closed Tuesdays. The September 7, 2026 check fell on a Monday, a normal operating day; September 8 was the usual Tuesday closure. The 34.8°C and pH 8.5 figures are 2025 property data, not a new 2026 analysis. Tattoo rules are unconfirmed.
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.
