Japanese figure skater and two-time Olympic champion Yuzuru Hanyu has written a best-selling autobiography series titled Blue Flames (蒼い炎, Aoi Honō) that consists of four volumes and has been sold with over 400,000 copies by June 2023.

[7][11] In 2020, Hanyu's graduation thesis about the utilization of a "wireless inertia sensor motion capture system" in the sport of figure skating was published in the Journal of Human Sciences at Waseda University.

[14][15] Blue Flames (蒼い炎, Aoi Honō) is a best-selling autobiography series by Japanese figure skater and ice show producer Yuzuru Hanyu who competed in the men's singles discipline and turned professional in 2022.

[19][20] The series consists of four volumes, published between 2012 and 2023 by Fusosha and composed in collaboration with Japanese sportswriter Toshimi Oriyama and photographer Keiko Asakura.

[21] In June 2023, the number of sold copies exceeded 400,000 in total, making Blue Flames one of the most successful series of long-selling books in Japan.