Readers of my user comments will see that I reviewed the first four "American Ninja" movies years ago, but I only got around to reviewing the last entry just now. Hope it was worth the wait. Speaking of waiting, it wasn't worth the wait for me to track down and watch a copy of this movie.
The action, the main attraction of a movie like this, is very lame. There is only one real martial arts battle in the first 30 minutes of the movie. When the action does start coming, there is nothing exciting or special about the martial arts sequences. The movie is also not very well made. There are signs that footage is missing from the movie - either it was lost or never filmed, leaving to some question marks such as how Bradley's character severs the chain on his handcuffs. But even if the missing footage was here, the movie would still suffer from a badly written screenplay - there's barely a plot here, and it crawls at a snail's pace, with plenty of scenes seemingly only there to pad out the running time.
I suppose Bradley gives one of his better performances, though he's still not a very compelling actor. And it's always good to see Pat Morita, though he only gets three short scenes. But even with that stuff, the movie will still have even dedicated martial arts movie fans squirming in their seats.