> not its root
You might as well say that US culture has its roots in ancient Greece or Rome, or Reformation age Europe and claim it’s hundreds or even thousands years old. It would be worth about as much.
But yeah I agree with you in the sense that US/Canada are constantly affected by a constant influx of people belonging to different cultures.
Had there been barely any immigration after ~1800 American culture would be effectively as old and unique as the Japanese one. Quebec for instance is kind of (but not quite) like that.
> just there's objectively less to worry about not ruining something age old and unique.
Well they already did during the Meiji period and subsequently, what remains is not that significant.
Also what are your thoughts on Britain, Scandinavian and some other European countries? They would be effectively no different to Japan in this sense besides the fact that they have very large numbers immigrants.