Casshern is a 2004 Japanese tokusatsu superhero film adaptation of the anime series of the same name, written, directed, shot and edited by Kazuaki Kiriya. It is one of the few films released in the mid-2000s to be shot entirely on a "digital backlot", along with Sky Captain and the World of Tomorrow (2004), Immortal (2004), and Sin City (2005), and others.

A superhero film is a film that focuses on superheroes and their actions. Superheroes are individuals who usually possess superhuman abilities and are dedicated to protecting the public. These films typically feature action, adventure, fantasy, or science fiction elements. The first film about a particular character often focuses on the hero's origin story. It also frequently introduces the hero's nemesis.