The Japanese REALLY need an American editor
Dr. Akai, Dr. Akiba, names that sound alike, characters that look alike, etc.
Come on, this is film-making 101, at LEAST let the audience KNOW the characters so they can REMEMBER the characters.
But it still would have been a GOOD movie, up until the last 15 minutes when it became a STUPID movie.
The Japanese have skills but no talent. Go watch The Sixth Sense, go watch The Devils Backbone, you know gore, now learn suspense, learn how to pick a twist, and how to show that twist.