Japan is a culture where every aspect of life is the subject of intense shame and repression.
There's always some new fad going around which makes them all feel deeply inadequate, in this case to the point where one in ten of them will pay to have their foreskins chopped off.
It's a weird Oriental sex thing, and the numbers have nothing to do with jews or immigrants.
https://mainichi.jp/english/articles/20210903/p2a/00m/0li/007000c
There's always some new fad going around which makes them all feel deeply inadequate, in this case to the point where one in ten of them will pay to have their foreskins chopped off.
So yeah, you could say that.