I'm with you on national, racial and cultural identity being fluid imprecise concepts. It's tangential to the point I was making in this post. But there's only so much appending of extra information/editing I can do and still communicate reasonably well in a reasonable amount of time.

The simplified version of there being eight permutations of being racially/nationally/culturally Japanese are lost on a lot of people. Here I was referring to the shorthand version where all those things are unquestionable ticked boxes.

In general aren't people only referred to as American in America when they have the nationality box ticked?