I think you mean favouring their own ethnicity (which is fantastically narrowly defined, socially, in Japan. If one of your grandparents was Korean and the othe

I think you mean favouring their own ethnicity (which is fantastically narrowly defined, socially, in Japan. If one of your grandparents was Korean and the other three Japanese, you're mostly treated as Not A Real Japanese Person by Japanese who know. Which affects promotion prospects, for a start.) "Favouring your own ethnicity" has a simpler name...