Mirai Ninja, is a side scrolling beat 'em up arcade video game, released by Namco in 1988 exclusively in Japan. Mirai Ninja was adapted into the Japanese live-action film of the same name, which was also produced by Namco. The game runs on Namco System 2 hardware, and is the first Namco game to be adapted into a film.

A man's body and soul are stolen and used as part of a demon castle. What's left becomes Cyber Ninja. He teams up with the chi students whose cyber-earmuffs show matching red symbols. They fill their swords with ammunition, grab some neo-retro-cyber-antique guns and attack the demon robot expendable ninja squad. Each fight is won by whichever side uses more gratuitous special effects. They slay the Tron-like hover droids, who are destroyed in their shame. There's a showdown with a white-armored guy with dreadlocks, who is later reincarnated by the eclipse and a lot of multicolored lightning. After killing the make-up wearing effeminate spider person, the chi school fires a giant gun at the demon castle spider cyber robot. It blows up.