The story follows Yaiba Kurogane, a samurai boy raised in the forest by his father who ends up returning to city life in Japan.

This forces Yaiba and his allies to go on a quest to defeat the newly transformed demon lord, while also encountering several figures from Japanese history and mythology along the way.

A second anime television series adaptation produced by Wit Studio, titled Yaiba: Samurai Legend, is set to premiere in April 2025.

In the city, Yaiba finds out that he is a legendary warrior and has to fight the evil of a demonic looking high-school student named Takeshi Onimaru.

The people that Yaiba meets along his journey to become a true samurai encourage him, train him, or inspire him to greatness, though at heart he is still a child, and his incredible skill with a sword is matched only by his kindness towards his friends.

This unlikely group embarks on a host of incredible adventures where they meet legendary figures from Japanese history, and finally overcome impossible odds, and put everything on the line, to save the entire planet from a threat not of this world.

'True Samurai Legend Yaiba'), the television series is produced by Wit Studio and directed by Takahiro Hasui, with Touko Machida writing series scripts, Yoshimichi Kameda designing the characters and serving as chief animation director, Maiko Okada serving as animation producer, and Yutaka Yamada and Yoshiaki Dewa composing the music.