We see blood covering a room.

We hear that a girl went crazy and used a baseball bat to smash the windows at her old school. We see a flashback scene of this taking place; the girl walks across broken glass (lots of blood on her feet and hands.) The girl cries and screams gomen nasai (I'm sorry) as she scratches at her own throat (her neck is covered in blood.)

There is a scene of a person being hacked up and screaming in a torture ritual (no blood is actually shown).

A corpse with a bloody throat is seen.

A boy slams a girl's hand in a door, we later seen her bloody hand bandaged.

There are some bloody papers.

We see a charred body in a oil barrel. In the same scene, we see a corpse with a bloody throat.

The movie is very manipulative and very intense throughout. Many mind games. This can be either frightening, intense, or both at once.