Batman Ninja is a 2018 American-Japanese animated superhero film directed by Junpei Mizusaki, produced by Warner Bros., and animated by Kamikaze Douga and YamatoWorks, which features the DC Comics character Batman. Takashi Okazaki, the creator of Afro Samurai, is the character designer for the film. The first poster was revealed on October 5, 2017, and the trailers were released later on December 1, 2017. The film was released in the United States in digital format on April 24, 2018: it was released in physical formats on May 8 and was released theatrically in Japan on June 15. In its American release, writers Leo Chu and Eric Garcia have admitted to rewriting the film from the original Japanese script written by Kazuki Nakashima, ultimately making two very different versions of the same film.

Takashi Okazaki is a Japanese manga artist, visual designer and graphic designer, most notable for writing and illustrating the manga series Afro Samurai.