Mirai Ninja: Keigumo Kinin Gaiden (未来忍者：慶雲機忍外伝, lit. "Future Ninja: Stealth Joy Cloud Device Side Story"), is a side scrolling arcade game, released by Namco in 1988 exclusively in Japan. Mirai Ninja was based on the Japanese live-action film of the same name, which was also produced by Namco. The game runs on Namco System 2 hardware, and was the first game from the company to be based on a film.
Character designs and directing of the film were done by Keita Amemiya of Zeiram and Kamen Rider fam…