Mōretsu Atarō (もーれつア太郎, "Fierce Atarō") is a Japanese comedy manga series written by Fujio Akatsuka. It was serialized from 1967 to 1970 in Weekly Shōnen Sunday. Two anime television adaptations were produced by Toei Doga (now known as Toei Animation), and aired by TV Asahi (then called NET TV). Anime has 90 and 34 episodes.