I have a Yuxin Little Magic from 2020 with the Japanese colour scheme.But that's what I'm saying. Possibly 100 million or more of the Rubik's Brand cubes in the world have the "Japanese color scheme", including 2 that I personally own. NEW Rubik's Brand cubes all have the color scheme you're used to. But a very large percentage of the total Rubik's Brand cubes in the world are not new - they are quite old.
I could see where producers of shows might say, "Hey, I have an old Rubik's Cube in my closet - let me go get it and we'll use it for this scene." Then if it's a 1980's Rubik's Brand cube, it's a good chance it's Japanese color scheme.