 FACT: In the scene when Sean shows up at his Dad’s house in Tokyo,  his dad apologizes for not picking him up because Tokyo is "one day  ahead" of the U.S., and thought he was coming on the 7th, which  would have meant that he would have already been waiting for Sean a  day early, not late which he basically implies. Also, in the scene  where Sean comes home late from messing with cars, he gives the  excuse that he thought it was only 7 because Tokyo was "a couple  hours early" not a "day early" like his Dad implies.