I deal with Japanese people on a daily basis due to my job. I have also visited the country. The people there are super polite and super nice. Are there some things that are off limits to foreigners? Sure. Why not? It's their culture. Are there off limit places or cultural things in all countries? Duh, yea!
As far as India goes, British folks have established multi-lineage families in India since the 1600's. You know, before the US was a thing.
I'm a Democrat but Joe is losing his mind. And the irony is that he said this shit during a Asian-American fundraising event. Those poor people who paid a thousand per plate had to be shaking their heads.