just guessing - Japan won’t take refugees and thus “not of the free world” or “not one of us” at the UN
Might have something to do with the fact that the typical Japanese works and obeys the law, if I may be allowed to generalize.
And they’re Asian, part of that inconvenient demographic that raises the academic curve for his real constituents. I’m pretty sure that in Obama’s world, whites, Jews, and Asians are “not-good” and Hispanics, Arabs, and blacks are “double-plus good.”