Okay, so you acknowledge that orchestrated or not, the native populations of European countries are going extinct and ultimately are going to be replaced. Japan doesn't want that, as it's an existential issue for their nation. I would argue possibly THE most existential issue a nation can face.
I would personally argue that it IS orchestrated, as this massive change happened in 50 years after 1000+ years of no change, but it's not relevant to the actual outcome. Call it a racist conspiracy theory all you want, people are becoming immune to that strategy.