Do Your Best Genki is a sports manga by Yū Koyama about Horiguchi Genki, a boy who is raised by a single father, and who wants to be a boxer like him. It was adapted as an anime television series by Toei Animation. The manga received the Shogakukan Manga Award for shōnen in 1977.

• Toshiko Fujita
• Katsuji Mori
• Makio Inoue
• Kazuko Sugiyama
• Shuichi Ikeda
• Hiroshi Masuoka
• Keiko Han
• Hiroshi Ôtake