Continuity mistake: In the flashback scene at the end of the movie, when the girl runs into the classroom with the Romeo and Juliet book, she raises the book in the air and her fingers are shown holding the area of the book that is slightly below the middle. The shot cuts to a closer angle of her where she is now holding the book more towards the bottom of it. (02:25:45)
Revealing mistake: When Shin shoots Ami in the stomach, it is apparent that the blood spurt that emerges from her stomach is a poor CGI blood spurt. The blood shown is too bright to match the lighting and there is no stain or rip shown in her clothing. (02:17:45)
Continuity mistake: When Shin and Taeko are in the boat sailing in the lake to dispose of Jay's bones, in the wide shot Shin stops rowing and leaves the oars in the water. The camera then cuts to a much closer shot of the two, where the oars are suddenly back in the boat. (01:38:40)
Revealing mistake: When Shin begins chopping off Jay's head, in the close-up shot a line can be seen around the part of Jay's neck that hasn't been cut yet, revealing that it is a prop head. (01:35:05)
Continuity mistake: When the crew are on the train on the way to the next filming location, outside the window the train is shown going past a large building. It then cuts to a closer shot where Murata says once they arrive they'll steal a car, and the large building outside the window is nowhere in sight. (01:24:30)
Continuity mistake: When they are filming the scene on the sidewalk, Shin shows the woman a handkerchief, and she extends her left arm. When Shin starts singing in the next shot, her left arm is suddenly against her body. (00:53:25)
Continuity mistake: When Murata first announces himself at the concert, the microphone in front of him is positioned so that it is facing towards him. The camera cuts to a closer angle of him, where the microphone is pointed away from him. (00:50:29)
Continuity mistake: At the concert before Murata starts performing, a woman is holding a baby. The baby is shown holding a packet in its arm, with the arm resting. It then cuts to a different angle, where the baby's arm is suddenly raised slightly. (00:49:45)
