The live-action version of Kengo Hanazawa's manga “Under Ninja” tells the story of a secret ninja organization in modern Japan and the rebels who break away from it. Directed by Yuichi Fukuda, the film stands out for its strong action scenes and the cast's passionate performances. However, Fukuda's trademark comedy style clashes with the manga's original tone, disrupting the film's overall balance and introducing challenges that influence how the story unfolds.

The animated "music on film" was adapted from a cartoon in which sound could be heard. Through animation, it brought viewers hot images of the power of jazz and performance scenes.