This is called yukimi onsen, meaning enjoying snow views while soaking in an open-air hot spring.
Matsukawa is a charming, secluded hot spring town tucked neatly inside Towada-Hachimantai National Park. Established in the Edo Period, the water has a light, milky appearance because of its high sulfur content and is said to boost blood circulation, thus helping to heal many ailments. There are a couple of ryokans(traditional Japanese inns) where guests can enjoy oldstyle open-air baths with scenic views for free. Visiting is a soothing and unforgettable way to experience the traditional appeal of rural Japanese culture.
90 minutes from Tohoku Shinkansen Morioka Station by bus