Nintama Rantarou

Set in the Sengoku Period, Rantarou, Kirimaru, and Shinbei are young students at Ninjutsu Academy, a school that trains youth to become ninjas. Known as "Nintamas" (a blend of ninja + tama [egg]), the main trio, along with many other students, must acquire various unique skills to reach their goals. However, things are not so straightforward, as the protagonists often find themselves failing their classes.

With strict ninja teachers like Doi-sensei and Yamada-sensei, mischievous girls from the Kunoichi class, a crew of pirates, and many other intriguing characters, anything can happen in the wild world of Nintama.

Each episode lasts 7 minutes and 30 seconds, and there are currently 29 seasons, each typically containing 60-90 episodes.