
Under Ninja

 is a Japanese manga series written and illustrated by Kengo Hanazawa. It has been serialized in Kodansha's "Weekly Young Magazine" since July 2018.
Publication.
"Under Ninja" is written and illustrated by Kengo Hanazawa. Hanazawa launched the manga in Kodansha's "seinen" manga magazine "Weekly Young Magazine" on July 23, 2018. Kodansha has collected its chapters into individual "tankōbon" volumes. The first volume was released on February 6, 2019. As of March 5, 2021, five volumes have been released.
In North America, Denpa announced the English language release of the manga in July 2020.