Omuro Onsen, Omuro, Matsushiro, Nagano City
Omuro Onsen Makiba-no-Yu
A strong choice for drivers who want a view, lunch and well-documented spring water. Matsushiro-so is easier to combine with the castle town if you do not have a car and only have half a day.
Check before bathing
- Opening hours
- Weekdays 10:00–21:00; weekends and public holidays 10:00–21:30. Normally closed Mondays and Tuesdays; holiday openings may be followed by a substitute closure. The hotel announced a return to regular operations from 11 July 2026 after extended maintenance, but check current notices before visiting.
- Tattoo policy
- The current first-party information does not confirm a tattoo policy. Check with the bathhouse before visiting.
Spring & water temperature
- Spring-source temperature
- 40.4°C.
- Bathing temperature
- Not published. The 40.4°C figure is the source temperature, not a fixed pool temperature.
- Spring source
- Omuro Onsen Makiba-no-Yu spring.
- Spring classification
- Calcium-sodium chloride spring; low-salinity, mildly alkaline and classified as a spring.
- pH
- Not published.
- Flow rate
- Not published.
- Water handling
- The operator explicitly describes the water as 100% source-flowing, without added water, heating or circulation. The pools are drained and refilled daily. The Ki-no-Yu and Iwa-no-Yu bathing areas rotate regularly; the open-air bath looks towards the Zenkoji Plain and Northern Alps.
Bathing indications
The operator lists general bathing indications including neuralgia, muscle and joint discomfort, chronic skin conditions and sensitivity to cold. These are not treatment or beauty guarantees.
The operator describes the baths as 100% source-flowing, without added water, heating or circulation; the pools are changed daily.
Admission is ¥600 for adults, ¥400 for elementary- and middle-school students, and free for younger children. Face towels cost ¥180 and bath-towel rental ¥500, with a deposit required. Sauna users must wear the designated sauna clothing; it can be rented.
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.
