Can confirm. Taught in Japan for 20 years. Married there, had 3 kids there, lived there for 24 years and even on the day we left I was called foreigner by parents whose kids I taught for 8 years. Even my colleagues I knew for 20 years called me it.
20 years in they used to ask stupid questions or on staff nights out thought hey were being PC by asking if we should eat at McDonalds for my benefit.
Lovely place, however its Institutionally racist to the core unfortunately. A westerner can never be accepted over there.