Just for fun, name as many Japanese/American differences in video games that you find interesting. Anything from name changes, music differences and sprite alterations in general.
>Superman (NES, Famicom)
Unlike the American NES version due to media copyright laws, the Japanese version uses 8-bit renditions of the music heard in the 4 Superman movies. You can also register a name for your character.
>Wrath of the Black Manta/Ninja Cop Saizou.
Same game, but totally different music and art styles in the cinemas that fits the two individual countries.