This was the first film of a five picture deal for Lucinda Dickey who Menahem Golan wanted to make her a star very badly. The other films in the deal included Breakin' (1984), Breakin' 2: Electric Boogaloo (1984), Breakin' 3, which was planned but fell apart, King Solomon's Mines and its sequel, Allan Quartermain And The Lost City of Gold. The latter three films didn't happen for her because she felt that both she and Cannon Films were totally tired of each other at that point.
The arcade machine in Christie's apartment is a prototype of the game "Bouncer" by Entertainment Sciences. Due to financial difficulties the game was never widely released.
The eye patch Yamada wears is a Tsuba, a hand guard for a katana
Director Sam Firstenberg considered the film to be quite a failure for many reasons. The first being the fact that no fan of the first two Ninja films would buy Lucinda Dickey as a Ninja and a female hero. The second was the mishmash of Flashdance (1983), The Exorcist (1973), and a regular Ninja movie that didn't gel at all. Lastly, the whole ninja concept would have to be refashioned and eventually they came up with American Ninja (1985), a year later which was also directed by Firstenberg and starring Michael Dudikoff.