In the turbulent Sengoku era, Rantarou, Kirimaru and Shinbei attend Ninjutsu Academy, a place where youths are trained to become ninjas. Dubbed "Nintamas" – a blend of ninja and tama (egg) – the trio, along with many classmates, must master diverse techniques to reach their aspirations. Yet progress is hard; the heroes frequently fail their lessons.
Under stern instructors like Doi‑sensei and Yamada‑sensei, alongside the playful Kunoichi girls, a band of pirates, and countless other colorful figures, chaos reigns in the world of Nintama.
Each episode runs for 7 minutes and 30 seconds, and every season—there are now 29 in total—typically contains between 60 and 90 episodes. The series blends action, humor, and heartfelt moments, keeping viewers engaged across its many seasons.