A perspective from the antipodes.
On of the reasons it is a bit difficult [but certainly not impossible] to emigrate to Japan is the concern of many Japanese that the way Japanese society is organized might be perturbed.
In the past, some dumb assumptions were made based on outdated notions of so-called blood ties. It was relatively easy for Brazilians of Japanese descent to migrate back to Japan for work.
However, it turned out that these Brazilians were, not surprisingly, much more Brazilian than Japanese leading to incidences of friction in some places such as Nagoya [where all the subways and train signs are, btw, also in Portuguese], Hamamatsu and their environs.
Although Brazilian Japanese girls, in my view, often seem to combine the best of both cultures
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One country that appears to handle multiculturalism relatively well, Milo notwithstanding, is the ever underrated and underestimated Canada.
Noticed that the supposed red-neck oil town of Calgary in the supposed red province of Alberta has elected a new mayor who happens to be Muslim and, very much unlike the US, the collective Canadian reaction is a big Gallic shrug.
Also, a recent attempt by Fox News to set up a foot hold in Canada for it's uniquely weird American brand of hyper histrionics has been sent unceremoniously packing.
Fox is also in Japan, but is limited to US movies and TV shows. No one is going to tolerate that level of public crazy rude behaviour.
Never criticize anyone until you've walked several kilometres in their shoes.
Because
1. You're now several kilometres away; and
2. You've got their shoes.