The first traffic lights were imported to Japan from the US in 1930, and had "subtitles" written on them because people had a hard time understanding what the colors meant*.
Something I find entertaining about the stock colors is that the idioms "in the red" and "in the black" mean the same thing in Japanese as in English.
Something I find entertaining about the stock colors is that the idioms "in the red" and "in the black" mean the same thing in Japanese as in English.
* https://www.pref.hiroshima.lg.jp/uploaded/image/24705.gif