Why is green, blue in Japan?

Have you ever wondered why green (midori) is blue (ao) in Japan? In Japan, Japanese people wait on red, go slow on yellow, and go on “blue”. Before 1930 the word for green was Midori. However, it was 1930 in March when the first traffic light was placed in Hibiya and it was then where the press (newspaper at the time) used ao to describe the color. The reason for this was because they felt that people would prefer it to be described as blue. This is what I learned from a Japanese friend and various Japanese sources. On 1947, the word ao was used in law to describe green light. <a href="https://tokyojapan.medium.com/why-is-green-blue-in-japan-1efa8cd37c4">Learn More</a>