Actually there are people in this thread who think that destroying culture is a positive thing, so people are in fact saying that and sometimes they are pushing for it whether they say it outright, or they do it without knowing it will be the consequence.

And as far as the places that have refugees where people are not happy about it, many people are insisting that refugees "help the economy" as a reason it should continue of course it's a narrow assessment and totally invalidates citizens concerns and that's the problem. Not to mention those pushing for refugees never seem to live in the neighborhoods where the burden or problems will need shouldered. It's always some moral stance rather than an empirical one and frankly a citizens preference to not have to deal with the trouble should be the first consideration but lately it hasn't been.

Immigration here is incredibly relaxed. If you have a college degree, you can find someone willing to offer you a job, and you haven't committed a felony, you're welcome. People just choose not to come to Japan because they endlessly hear how supposedly racist it is here and how difficult it is to get over the language barrier.

And it may be a surprise to many westerners who find a need to push their cultural and political perspectives everywhere, but some people do indeed prefer protecting a cultural or national identity over quick economic gains. A non-insignificant portion of the world looks at America and and instead of thinking, "Wow, this is what we need to be", thinks, "This is what I don't want to become."

That's not evidence; you'll have to show that at least 50% of the population believe in 'preserving Japanese identity' and have voted as such to limit immigration, for that purpose. Otherwise you're talking from nothing, just your intuition. It's an easy intuition to have, I'll give you that.