During the rooftop fight scene between Batman and Kyodai, the same background is used in two sequential cuts.
When Bruce traces Kyodai Ken's phone call, the number has seven digits. Japanese phone numbers have eight digits (plus anywhere from one to three at the beginning for the region code).
Before Alfred offers Bruce a cup of tea, Bruce is seen mediating on the floor with a dragon statue emitting smoke, once the camera angle changes from a low angle to a high angle, (and the back to a low angle) the dragon statue is no longer visible on the rug where he was mediating.