快樂快樂月刊
"CoroCoro Comic" sold 400million copies as of April 2017, making it one of the best-selling comic/manga magazines. The magazine has three sisters: "Bessatsu CoroCoro Comic" (別冊コロコロコミック), "CoroCoro Ichiban!" (コロコロイチバン) and "CoroCoro Aniki" (コロコロアニキ). "Bessatsu" and "Ichiban!" are published bi-monthly, while "Aniki", which targeted an older audience, was released quarterly.