Hirugami Onsen, Achi, Nagano Prefecture
Yuttarina Hirugami
A dependable first stop in Hirugami if you need the longest opening window, family swimming, a sauna or an assisted/family bath. For a quieter feel or more rural scenery, look at Achi-no-Sato or Hirugami-no-Mori.
Check before bathing
- Opening hours
- 10:00–21:30; last admission 20:30. Closed Tuesdays, or the following day when Tuesday is a public holiday. Assisted and family baths require advance confirmation or a reservation.
- Tattoo policy
- The current main official pages reviewed do not provide a clear, facility-wide tattoo rule. Contact the facility before visiting.
Spring & water temperature
- Spring-source temperature
- Not published for this facility. Hirugami's regional figure of 47.4°C is not assigned to its baths.
- Bathing temperature
- Not published.
- Spring source
- Hirugami Onsen distribution system; the current main facility page does not identify a specific source well for this bathhouse.
- Spring classification
- Hirugami Onsen water. The regional tourism bureau classifies the area as an alkaline simple sulfur spring, but the facility's current main pages do not publish a matching, up-to-date analysis certificate.
- pH
- Not published.
- Flow rate
- Not published.
- Water handling
- Current 2026 facility information lists indoor and open-air baths, a sauna, waterfall shower, reclining and sitting baths, and a swimming pool. Complete pool-by-pool details on water addition, heating, circulation, disinfection and source flow are not published, so no treatment method is inferred.
Bathing indications
Hirugami Onsen publishes general and spring-type bathing indications. These are not treatment or beauty guarantees.
Current main facility pages do not give complete water-treatment conditions for each pool.
2026 admission is ¥800 for adults and ¥400 for children; bath-and-pool admission is ¥1,100 for adults and ¥550 for children. Tattoo rules were not clearly stated on the current main official pages, so ask before visiting.
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.
