I'm not going to watch their agitprop, but just replying to the title - doesn't Japan allow citizens to bring any foreigner over on a marriage visa? Well maybe that's just between America and Japan or other countries with a reciprocal agreement, but if true the whole premise of this falls apart.

Couldn't the Jap boy move to Turkey or did the Kurd's family get kicked out for causing problems there too?

I'm not going to watch their agitprop, but doesn't Japan allow citizens to bring any foreigner over on a marriage visa? Well maybe that's just between America and Japan or other countries with a reciprocal agreement, but if true the whole premise of this falls apart. Couldn't the Jap boy move to Turkey or did the Kurd's family get kicked out for causing problems there too?