Earlier quoted context omitted.
This is nonsense. "Post WW2" describes current modern Japanese culture, not its root. The root goes way back to hundreds/thousands of years BC, they continuously lived on those exact islands and spoke a similar language all that time. Unlike US or Canada which are a new amalgamation of English/French/Spanish/German/Jewish/AA/Native/whatever cultures without any single root. Not to say US or Canadian culture is worse…
> 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…
No. Greeks, Romans, Vikings, Slavs, Turks, Arabs, Mongols etc, different peoples have their respective roots for sure, but those roots are elsewhere. Once you move across the ocean and mingle with a bunch of others coming from radically different backgrounds and histories, different mutually unintelligible languages and incompatible religions it's a completely different story than if you live at the same locality, speak the same language and carry broadly similar values and beliefs as N generations and thousands of years back. Except for first nations, people of US and Canada are still very much guests on their soil if you compare those timescales (actually even first nations may have settled Canada a bit later than Japanese settled Japan by skimming Wikipedia but that I'm not sure). From inside one of those new cultures (who are cool and unique in their own ways, sure) it can be easy to miss the significance.