Fufu Kyu-Karuizawa Restful Forest

A Michelin Key-holding luxury ryokan-style resort sitting beside Kumoba Pond in the Karuizawa highlands, where the forest does most of the therapeutic work before you've even checked in. Rooms run warm via underfloor heating and wood stoves, and the hot spring baths handle the rest. The design is sleek and contemporary, the restaurant leans into regional Shinshu cuisine, and the whole operation is quiet enough that you'll forget the train exists.