LOL! Good one!
Japan is a prosperous, capitalist, society that is very homogeneous. That was bound to ignite the fury of the UN types sooner or later. If Japan is smart, they won't open the immigration floodgates. There's nothing wrong with a race of people maintaining their own turf for themselves. That's true of all races. The idea that every corner of the earth has to be racially, religiously, and culturally integrated is absurd.