A few generations ago they were enslaving people [0]. This is what racism can lead to. Maintaining their heritage, their way of life, some would say.

Hopefully their population decline doesn't hit them too hard. But that, and their lack natural of resources, could lead to bad things. Fascists and their ilk thrive in such situations.

[0] https://en.wikipedia.org/wiki/Slavery_in_Japan#World_War_II