A couple of weeks ago I hypothesized in Taki’s Magazine:

That raises the question of why Japan’s ruling class didn’t feel the necessity of going down the same mass-immigration path as did so many other advanced countries: Why is Japan such an exception? …

Another reason is that Japan is linguistically quite isolated from the growing worldwide dominance of the English language.

If elites unthinkingly think alike, one reason could be because they increasingly share a language: English. …

As a side effect, the prevalence of English spreads American ideological fads.

For example, over the course of my lifetime, the American media, such as movies, has shifted to an assumption of “Our Ancestors, the Immigrants” from “Our Ancestors, the Pioneers.” …

But the Japanese are remarkably immune to American verbiage. That may be because the Japanese are terrible at learning English.