Healthy Misato’s Kogen no Sato Onsen: Hours, Baths and Getting There
At Kogen no Sato, weekday day bathing opens at 3 p.m. from April–November; weekends and public holidays start at 10 a.m.
Checked: September 27, 2026
Healthy Misato is a lodging and nature-education centre in a former wooden junior high school. Its bath, Kogen no Sato Onsen, is part of that wider site rather than a standalone spa. It makes most sense after a walk, wildlife activity or overnight stay in the area; a weekday morning drive just for a soak means waiting until mid-afternoon.
Day-use hours and admission
| Season | Weekdays | Weekends and public holidays |
|---|---|---|
| Spring through autumn | 3–7 pm | 10 am–7 pm |
| December–March | 3–6 pm | 11 am–6 pm |
| Item | Current listing |
|---|---|
| Adult admission, visitors from outside Hayakawa | ¥700 |
| Child admission | ¥300 |
| Shared rest room with admission, adult | ¥1,000 |
| Private-room rest plan | ¥1,500; up to about eight hours, subject to availability |
| Towel rental / face towel | ¥200 / ¥300 |
Tuesday is the regular weekly closing day; Wednesday is also a closing day in winter.
The official pages do not publish one fixed daily bath temperature. If you need a specific temperature or want to reserve a private room, call before setting out.
The spring is heated before bathing
Healthy Misato draws water from roughly 250 metres underground and heats it for bathing; the operator describes it as a cold mineral spring. Its analysis classifies it as a sulfur-containing sodium/calcium chloride-sulfate spring, with pH 8.5 at the source and 9.3 in laboratory testing. Hayakawa Town’s spring table gives a temperature that conflicts with the operator’s description of the water as cold, so the figure is not treated here as a confirmed source temperature.
In practical terms, this is not a source-flowing bath. The appeal is the quiet setting, the old school building and the chance to rest between outdoor activities, rather than an untreated hot spring or a large set of pools. Bath views look out toward the surrounding woodland; the facility does not advertise a sauna or outdoor bath as part of its current day-use offer.
Make the bath part of a day outdoors
The Southern Alps Eco Village also includes the Wild Bird Park, about a ten-minute walk away, and runs nature programmes that vary by season. Check those separately before building a day around them; a programme schedule is not the same as bath opening hours. If you are already in the area, a weekend bath can fit after a morning activity. On a weekday, put another stop or lunch first and arrive closer to 3 pm.
Public transport takes timetable planning
The closest stop is named Healthy Misato on Hayakawa’s shared-bus service, which connects with Minobu and Shimobe-Onsen stations. Service is limited, so check the latest timetable in both directions before you commit. The bath closes at 7 pm in the warmer season and 6 pm in winter; do not assume a bus will still be running after your soak.
For a spring-fed outdoor alternative, compare Yushima no Yu. A wider overview of current day-use choices is in the Hayakawa bath guide.
