Set in the area of Nozawa Onsen Village in Nagano Prefecture, this is one of Japan's most challenging trail courses. Spanning a total length of 65km with an elevation difference of 4,100m and a 17-hour time limit, this fascinating trail takes you through hot spring towns, lakesides, waterfalls, flower fields, and spiritual power spots. Every year, famous guest runners also participate, drawing much attention. Another attractive feature is the opportunity to enjoy 13 different public hot spring baths. If you stay at a partnered accommodation, you can use accommodation support coupons.