Under Ninja (Japanese: アンダーニンジャ, Hepburn: Andā 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. An anime television series adaptation by Tezuka Productions aired from October to December 2023. A live-action film adaptation premiered in Japanese theaters in January 2025. Source: Wikipedia (en)