Ghost Dog: The Way of the Samurai (1999)

Ghost Dog (Forest Whitaker) is a contract killer, a master of his trade who can whirl a gun at warp speed and moves through this world like a phantom -- stealthy and evanescent. In the spirit of the samurai, he has pledged his loyalty to a small time mobster named Louie (John Tormey) who saved his life many years before.