Tokyo Flag: Meaning and History

History of the flag
The flag of the Tokyo metropolis was adopted in 1989 and symbolizes Tokyo's modernization.
It was designed in an ecological and futuristic spirit : the vibrant green represents a sustainable, forward-looking city.
What do the elements of the flag mean?

Represents a stylized version of a ginkgo biloba leaf, Tokyo's emblematic tree.
The white background symbolizes purity, peace and transparency of the government.
