Shinhotaka Onsen Nakashimakan

Deep in the Okuhida mountains, this small family-run ryokan taps a free-flowing source and offers an outdoor bath with open views of the Northern Alps. The building has a warm Showa-era retro character, a bit dated, but scrupulously maintained, and the hosts put real care into every detail, from heated floors to the breakfast spread. Guests keep coming back.