10 Crazy Things That Only Exist in Japan — You Won’t Believe #4

7. Traffic Lights That Are Technically “Blue”

In Japan, the color green didn’t officially exist in the language for centuries — everything was described as a shade of blue.

So when modern traffic lights were installed, people called the “go” light aoi (blue).
Even today, laws require the lights to be “the bluest shade of green possible.”

Look closely next time you’re in Japan — the “green” light is actually turquoise.