Continuity mistake: When Regan and Bianca first jump on the bus to escape the hitmen you can see through the windows that there are only six people on the lower deck, but when the scene changes to inside the bus all the seats are full. (01:00:24)
Revealing mistake: During the demonstration of the Iron Claw technique in the opening credits, the master grips two bamboos; as he does it, you can see they are already cut before he applies the technique that supposedly splits them. (00:03:55)
Continuity mistake: Introduction of Ilona Staller; Dr. Wong leaves saying "Nice to meet you." Next shot and Ilona Staller's right hand which was out of frame is now abruptly on her chest. (00:06:15)
Continuity mistake: After the Abebo murders, tempers run high at the meeting of the clan. The sinister Sakoda accuses the one raising objections to be a wimp, and the guy slams his fists on the table. The president of the meeting says "stop it"; Sonny Chiba is leaning forward with both hands, but in the next shot he has one hand in front and one in the back. (00:20:00)
Continuity mistake: Philippe Noiret is sitting in his chair, drily commenting on the display previously offered by Charlotte Rampling when she was bare-breasted. During the scene, the position of his glasses as he suckles on them changes frequently, and at one point the arms go from folded 90° to less angled/straight as the view changes.
Continuity mistake: After the disco scene, the protagonist is back home. She receives a phone call from Jacques and meets him. When she has a wine glass in hand, the glass switches hand from left to right in the cut when she sits down.
Other mistake: In the opening credits, "Cameraman" is mispelled as "Camerman."
Continuity mistake: Inès the Housekeeper is on the boardwalk looking at the ship and the various passengers that disembark. She waves at Mrs. Susan House when she sees her, and walks up to her, meeting there amongst the passengers who just got off the ship...the same dudes (a man with a striped T-shirt, a guy with an open shirt with white pants, one denim-clad guy with a bag) who were lazing around not too far from her when she was on the promenade. (00:04:30)