Yunishigawa Onsen, Nikko, Tochigi Prefecture
Yunishigawa Mizunosato
A useful stop on the way to Yunishigawa Onsen for source-flowing water, a mountain-valley open-air bath, footbath and suspension bridge. Choose it for the setting and the spring, not for a large number of pools.
Check before bathing
- Opening hours
- The bath is open 10:00–19:00; last admission 18:00. Usually closed Wednesdays; when Wednesday is a public holiday, it closes the following Thursday.
- Tattoo policy
- The current official pages reviewed do not confirm whether tattoos are allowed, or give rules on size or cover stickers. A public or city-associated facility is not automatically tattoo-friendly; check directly before visiting.
Spring & water temperature
- Spring-source temperature
- Not published for Mizunosato. Figures from the separate Yunishigawa roadside station spring are not applied here.
- Bathing temperature
- Not published. The operator mentions that visitors often find the water hot, but gives no fixed temperature.
- Spring source
- Yunishigawa Mizunosato's spring; the current main pages do not publish a separate source name.
- Spring classification
- Alkaline simple hot spring.
- pH
- pH 9.5.
- Flow rate
- Not published.
- Water handling
- The operator and Nikko City describe the large bath as source-flowing. The current main pages do not publish the source temperature, yield or complete pool-by-pool conditions for water addition, heating and disinfection, so those details are not inferred.
Bathing indications
The operator lists general bathing indications including neuralgia, muscle and joint pain, frozen shoulder, sensitivity to cold, fatigue and general health maintenance. These are not treatment or beauty guarantees.
Source-flowing use is confirmed. Other pool-by-pool treatment conditions are not published.
From 1 April 2026, admission for non-Nikko residents is ¥1,000 for guests aged 13 and over, ¥700 for children aged four through elementary school, and free for children under four. 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.
