I dont rememember much because I saw it years ago... theres a detective with a sword and he happens to be a skilled ninja...theres another ninja clan that is just murdering people right and left and he has to stop them. Theres a scene where the bad ninja carry out a massacre in a subway train full of people. The detective steps in and kills a bunch of them with his sword. After the massacre the police are investigating and his superior asks him to give him his sword because they want to use it as evidence. He refuses, and his superior tells him he has no choice because its the law. So he drives his sword into the train's floor with a quick stab and then breaks it, and gives the broken pieces to his boss.... Any idea? from what I remember it was a good movie...and since theres so many CRAPPY ninja movies I wanted to see this one again.