ok, so it happened to 1 guy, and it was such a novel thing that you happen to know about it because its an interesting factoid. it's not common. realistically it's impossible for most people. I know someone who is white, born in japan, has lived there for 40+ years, native japanese speaker and she does not have citizenship.

my wife and extended family are japanese. she is actually half japanese, so i get a special view of all the weird racism embedded into their society. she even has citzenship as well as my kids, but she still is not treated as japanese because of her appearance.