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)
