Do Your Best Genki (がんばれ元気, Ganbare Genki) is a Japanese sports manga by Yū Koyama about Genki Horiguchi, 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.

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