The killer stalks and eventually knocks out the girl, in a dark and eerie scene. May be frightening to some.
The killer tortures the woman brutally, in a disturbing and horrifying way. He describes the blood arising from her mutilated body as a flower blooming, which is very disturbing, because he clearly enjoys what he is doing.
In the final scene, the samurai shows us his "collection", which consists of dozens of mutilated body parts, some more in tact than others, most in a state of rot. Maggots and worms are shown accumulating all over the display. He is shown adding the girl's head to the collection.
At the end of the film, we see the cameraman back on the streets, zooming in on a girl's head, indicating the next victim.