Nasuyumoto Onsen, Nasu, Tochigi Prefecture
Shikanoyu, Nasu Onsen
The first choice if you want Nasu Yumoto's history and traditional bathing culture. If you need to wash your hair and body after a hike, Kojika-no-yu is more practical.
Check before bathing
- Opening hours
- 08:00–18:00; last admission 17:30.
Spring & water temperature
- Spring-source temperature
- 53.7°C for the Shikanoyu–Gyōnin-no-yu blended spring, according to Nasu Town's tourism association bathing guide.
- Bathing temperature
- 41°C, 42°C, 43°C, 44°C, 46°C and 48°C pools are listed for men; the women's side has no 48°C pool.
- Spring source
- A blend of Shikanoyu and Gyōnin-no-yu springs.
- Spring classification
- Simple acidic sulfur hot spring (hydrogen-sulfide type); acidic, low-tonicity, high-temperature spring.
- pH
- 2.4, according to Nasu Town's 2025 bathing guide.
- Flow rate
- Not published.
- Water handling
- Naturally emerging sulfur spring water from Nasu Yumoto feeds several pools at 41–48°C. The current main facility page does not detail water addition, heating, circulation or disinfection pool by pool; no unconfirmed treatment method is inferred.
- Analysis date
- 2018
Bathing indications
The facility lists general bathing indications including neuralgia, muscle and joint pain, sensitivity to cold and fatigue, along with spring-specific indications and cautions. These are not a treatment guarantee.
Adult admission is ¥500, elementary-school children ¥300 and younger children free. Soap and shampoo are prohibited. The facility may close for maintenance.
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.
