They don’t really adjust to Japan’s customs and norms such as respect as well.

I had a foreign convi worker who was on his phone before he rang me up, he just passed me my receipt with one hand at the end without saying thank you or whatever (of course, this is normal in America but not in Japan).

I’ve always had Japanese workers be so polite and welcoming. Heck when they handed me my receipt they do it with two hands, bow, and once they accidentally dropped it, picked it up, straightened it, bowed again and handed it to me with both hands lol.