CoroCoro Comic (コロコロコミック, KoroKoro Komikku) is a Japanese monthly manga magazine published by Shogakukan; established on May 15, 1977. Its main target is elementary school-aged boys. Several of its properties, like Doraemon and the Pokémon series of games, have gone on to be cultural phenomena in Japan. The name comes from a phenomime korokoro (ころころ) which means "rolling" and also represents something spherical, fat, or small, because children supposedly like such things. The magazine is A5-sized, about 6 cm (2+1⁄4 in) thick, and each issue is 750 pages long. CoroCoro Comic is released monthly with new issues on the 15th of each month (or earlier if the 15th falls on a weekend). CoroCoro Comic sold 400 million 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. On November 20, 2020, CoroCoro Comic cover designer Tariji Sasaki was recognized by Guinness World Records as the longest-running cover designer for a children's magazine. CoroCoro Aniki ended publication in March 2021. Source: Wikipedia (en)