Speaking with regards to this, first of all, Ainu (Hokkaido) folks deserve to have the right to self-determination over their land. The Ainu folks aligned themselves with Russia (for which, they were genocided), why are they still part of Japan? Similarly, the Ryukyu (Okinawa) folks have been oppressed by the Japanese. Both these groups of islands have American base. I think I’m probably forgetting the name of the third group (Honichi? Kyushu? I don’t remember), which have again, been suppressed and forced to adopt the Japanese identity.