Hirugami Onsen, Achi, Nagano Prefecture
Achi-no-Sato Hirugami Day-Use Bath
A strong choice if you prefer a smaller bathhouse, a quiet green setting, basic amenities and accessibility information. Check the last admission time for an evening visit and seasonal notices before relying on the outdoor baths.
Check before bathing
- Opening hours
- 11:00–19:00; last admission 18:00. The outdoor bath and herbal bath were closed from 13 January to 6 March 2026; that scheduled closure has ended, but check for future winter notices.
- Tattoo policy
- The current main official page reviewed does not provide a clear, facility-wide tattoo rule. Contact the facility before visiting.
Spring & water temperature
- Spring-source temperature
- Not published.
- Bathing temperature
- Not published.
- Spring source
- Hirugami Onsen; an individual spring-well name is not published.
- Spring classification
- Alkaline simple sulfur spring, according to the facility's current description.
- pH
- Not published.
- Flow rate
- Not published.
- Water handling
- The facility explicitly says its natural spring water is used without adding water. It offers indoor, open-air and herbal baths. Heating, circulation, disinfection and the source-flow conditions of each individual pool are not fully published.
Bathing indications
The facility lists general bathing information for an alkaline simple sulfur spring. This is not a treatment or beauty guarantee.
The facility confirms no added water; heating, circulation, disinfection and source-flow conditions are not published pool by pool.
Admission in 2026 is ¥800 for adults and ¥500 for children aged 3 through elementary school. Body wash, 2-in-1 shampoo, bar soap and hairdryers are complimentary; hand towels cost ¥200 and bath towels ¥600. The facility's current main pages do not clearly state a tattoo rule, so ask ahead.
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.
