I just discovered this interview online. One I did with ICON-X when I just finished skating in Shanghai. It already feels like a blast from the past! Just click on the image for the interview.
As indicated in the Hokkaido Snowy Mountain Guidebook (Hokkaido Yuki-yama Gaido – ISBN: 978-4894538047).
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.