In Japan, motor vehicles drive on the left side of the road; thus, most Japanese vehicles are right-hand drive. But all of the vehicles shown are left-hand drive.
When the team gets the mission, Jim has to theorize on how Masaki killed his sister. There is no way to know their exact movements, thereby make Masaki believe that someone filmed the killing exactly as it happened.
When a guard brings Harry Kellem a food tray, he slides it across the floor through a hole in to bottom of the cell door. There are very rough saw cuts at the corners of the hole, chips in the silver paint and visible wood grain revealing that the door is painted wood, and was never meant to be photographed at close range from inside the "cell".
The room in which Paris was giving his performance there was a
Magnavox television set among all the Japanese furnishings. This set would not work in Japan due to the different television broadcast standards.
When Paris is discussing jiu-jitsu with Masaki he shows him an article in a newspaper about Willie, but it is printed in English. Since Masaki is fanatically anti-American per the mission tape scene, it is highly unusual he would have such an edition in his home.