This is a myth - Japan does not collect data on ethnicity/background [1], so we just don't know. Japan has a (to foreigners) invisible and extensive caste syste

This is a myth - Japan does not collect data on ethnicity/background [1], so we just don't know. Japan has a (to foreigners) invisible and extensive caste system [2] and a long history of looking down at Japanese of Korean background (who are quite common, but again, there are no official stats by Japan - South Korea tracks about 800k people in Japan [3]), plus all those Japanese of Brazilian background (Brazil estimates at least 1.4 million of those [4] [1] https://www.bbc.com/news/world-asia-34615972 https://www.bbc.com/news/world-asia-34615972 [2] https://qz.com/2029525/the-20-countries-that-dont-collect-racial-and-ethnic-census-data https://qz.com/2029525/the-20-countries-that-dont-collect-ra... [3] https://en.wikipedia.org/wiki/Koreans_in_Japan https://en.wikipedia.org/wiki/Koreans_in_Japan [4] https://en.wikipedia.org/wiki/Japanese_Brazilians https://en.wikipedia.org/wiki/Japanese_Brazilians