Osomatsu-kun (1966)
Original title: おそ松くん
Osomatsu-kun is a 1966 Japanese-language animation series. It stars Haruko Kitahama, Kazue Tagami and Midori Katō.
The first animated adaptation of the 1960s gag manga series, focusing on the adventures of the identical 10-year-old Matsuno sextuplets, led by the titular brother himself. Aside from the Matsunos, the series also showcases the tales of their rival Chibita, and the constantly job-switching conman Iyami.
Where to watch Osomatsu-kun
Stream: Crunchyroll