for many year i saw this movie a a real movie of ninja but after study more about this culture i can only think this be just another karate film . a black shinobi and some weapon doesn not make a ninja and it much more than that . the ninja be the most dangerous warrior of the japan because they be train in every aspect of life to survive to anything and kill whatever try to stop them . this movie be not a about a ninja warrior just about a clown try to be something he can not even understand .