johansvennung(臺灣)

I always wonder why the taiwanese put a "J" on the european union flag, first i thought it was Jugoslavia (since Turkey also had this habbit of having a blue strripe on the left of the car sign). However I saw many japanese brands with this "J" on it...it doesnt seem to be any ordern about this in Taiwan, so the letter can be whatever, most ofteh "F", "J"; "S"; "Gb" or "D". (this "J" marked car was a ford)...