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 Fujitaas Genki Horiguchi (voice)
Katsuji Morias Kenji Seki (voice)
Makio Inoueas Hideki Horiguchi (voice)
Kazuko Sugiyamaas Yuko Ashikawa (voice)
Shuichi Ikedaas Eiji Mishima (voice)
Keiko Hanas Tomoko Ishida (voice)
Hiroshi Otakeas Coach Nagano (voice)
Toru Furuyaas Takashi Kazan (voice)
Hiroshi Masuokaas Shozo Tanuma (voice)
Ichiro Nagaias Kisaburo Tanuma (voice)