It seems easy to forget that in the early days of Home Video, Sho Kosugi was very much a celebrity, making Ninja-themed movies like this. The plot is a revenge story, but the idea of Kosugi as a ninja who has hidden away his identity as such brings the film to a super-hero level as we have this man who is, along with his family harassed here in the Good Old U.S.A. because they bought a shop in an old building where some theives had hidden their loot. The action sequences are fascinating, a few interesting ninja techniques are shown and the fighting is fast and furious. Kosugi does not have the acting range, it seems, to handle heavier dramas, but he is ideally suited to the unique 80s genre of "Ninja Flick". Highly recommended. Not recommended to those fed a steady diet of computer generated "special effects" and cannot remember a time when athletic ability was required to nake a martial arts movie.
I myself first seen this at a drive in because I couldn't see it at the cinema I was a few weeks away from my 18th berthday but I'm really glad I saw this is in my own opinion one of Sho Kosugi best you want the only real Ninja in Hollywood Sho Kosugi was and still is!