Factual error: Star shuriken, despite common misconception, are not inherently deadly weapons. They were mostly used for distraction, since their lack of a single weighted point makes their attack rather inefficient (although the weapon could be coated with poison). Although it is possible to hit an eye, it is very difficult to hit such a small target or scoring a sufficiently deep wound to penetrate to the brain with a star shuriken.
Revenge of the Ninja (1983)
Plot summary
Directed by: Sam Firstenberg
Starring: Sho Kosugi, Keith Vitali, Arthur Roberts, Virgil Frye
Cho takes his mother and surviving son to America after their family was massacred by ninjas. He opens an art gallery only for his son to discover that the business is being used as a drug smuggling front.
More mistakes in Revenge of the Ninja
Lieutenant Dire: You talk to me, you son of a bitch. Now somebody's muscling in and I want to know who the fuck it is.
Chifano: That's my bag of apples.
Lieutenant Dire: And mine.
Chifano: Bullshit! You guys celebrate downtown every time one of us gets the clap. What the fuck do you want from me, Dire?
Lieutenant Dire: I want a name. I want addresses. I've got nothing.
Chifano: Then you've got what I've got. shit.
Trivia: It is commonplace for Sho Kosugi films that whenever a family is to be portrayed; his two sons Shane and Kane are cast into corresponding roles.