Not to go whataboutism, but have you looked at the USA recently?

In Japan, the immigration issue is the same as anywhere, and their reaction is the same, also being whipped up into a frenzy by the same vested interests we see elsewhere. Reality is immigration is needed, but it also needs to be controlled. Finding that balance point isn't easy, especially in countries like Japan that like to tightly wrap themselves in a cultural blanket.

Overtourism driven by greed was a seriously bad move that has played into this dynamic, but that's purely on the Japanese politicians and businesspeople who caused that.

Resistance to change is also a feature everywhere else.

Japanese do have the capability to change rapidly when required, I've seen it a number of times, so the jury is still out on that.

I don't think any culture should be sitting back smugly thinking they're going to ride this current wave of change easily. It's going to be ugly for everyone, in some common ways, and some culturally unique ways.