This morning, take time to explore Kawayu Onsen, renowned for its winter only thermal river baths. Each year, locals carve out sections of the riverbed to create the Sennin-buro, or “Thousand-Person Bath,” where natural hot spring water rises to the surface, warming the river to a soothing 40C. Bathing here in the open air, surrounded by winter mist, is an unforgettable highlight of the season.
If you prefer to walk, there are two options:
The Kogumotorigoe Trail, starting from Ukegawa after a short bus ride, ascends through forests and descends to the remote hamlet of Koguchi (12.4km / 7.7 mi, approx 4 hours). Alternatively, enjoy a shorter local walk near Hongu with fine valley views and time to visit nearby shrines or cafes.
This evening, return to your accommodation in Kawayu Onsen, where a soak in the outdoor baths and another delicious home-style meal round out a perfect winter’s day in Japan’s sacred countryside.
Elevation gain: 940 m / 3,080 ft of ascent and 930 m / 3,050 ft of descent
Accommodation: Ryokan (traditional Japanese inn)
Meals: B,D