" Second, when Ishikawa finally succeeds in penetrating Hideyoshi's castle in the film and is about to murder the man, Ishekawa realizes that the guy is about to die anyways of natural causes and he just leaves--muttering something about "killing him would be too kind"! So, he spent the entire movie trying to kill the man and doesn't when he finally gets a chance"
Shinobi No Mono 3: Resurrection (Shin shinobi no mono) trailer