Osomatsu-kun (Japanese: おそ松くん) is a comedy manga series by Fujio Akatsuka which ran in Shogakukan's Weekly Shōnen Sunday magazine from 1962 to 1969.

A new anime series by Pierrot, Mr. Osomatsu, began airing in October 2015 to celebrate Akatsuka's 80th birthday, with a manga adaptation by Masako Shitara serialized in Shueisha's You magazine from January 2016.

This series helped establish Akatsuka's reputation as a gag comic artist, long before his other popular manga, Tensai Bakabon, was released.

[4][5] The original anime series was produced by Studio Zero and co-produced by Children's Corner;[3] it was in black-and-white and aired in Japan between February 1966 and March 1967.

The series revolves around Iyami and Chibita competing to be the best chef at the Matsuno's restaurant in order to appeal to a food critique.

Mr. Osomatsu, produced by Pierrot, aired in Japan between October 2015 and March 2016 and was simulcast by Crunchyroll, making it the first piece of Osomatsu-kun media to receive an official English release.

[9][10] Additionally, the third episode, which features a crude parody of Anpanman, was edited for its BS Japan broadcast and is altered in its home video release.

[13] Naoki Urasawa stated that in mid-1960s Japan, the character Iyami from Osomatsu-kun was so popular that whenever children took a picture, they were sure to copy his iconic "Sheeh" pose.

He noted that Godzilla struck the pose in a film, as did John Lennon and Paul McCartney when they visited Japan.