Difficulty as assessed by the Hokkaido Snowy Mountain Guidebook, p. 10 (Hokkaido Yuki-yama Gaido – ISBN: 978-4894538047). This overall index takes into account route-finding, altitude, ascent in vertical gain, time on the mountain, and technical aspects.
- 2.5-5: Beginner
- 5.5-7: Intermediate
- 7.5-10: Expert
