Kose Onsen, Karuizawa Overview
A single hotel in the larch forest west of town, and the one genuine hot spring inside Karuizawa rather than an hour away at Kusatsu. The water is clear and mild, the outdoor bath faces trees on every side, and day visitors can bathe without staying the night. It is a fifteen-minute drive from the station with no bus worth planning around, so pair it with Shiraito Falls on the same road.
