The very first time she came over to the swinging bachelor pad/pitiful bunker I used to live in back when we were dating, my wife immediately noticed that the one and only interior decoration I had was a California license plate mounted on the wall. To me, the blue on white design is immediately nostalgic and reassuring.
In Japan, though, ordinarily the only thing that differentiates plates issued in different parts of the country are the kanji characters written across their tops, so they don’t provide quite the same immediate visual shorthand of local pride. Unless you happen to live in the city of Hakone, where motorists can show their love of their hometown and giant robot anime all at once with new Evangelion license plates.