The Flag of Tokyo, Japan is the official symbol representing the capital city of Japan. Adopted on March 26, 1947, the design consists of a white field with the city's emblem in the center. The emblem features a red disk (representing the sun) encircled by an olive branch and a rice sheaf, symbolizing peace and prosperity. The flag has a proportion of 2:3 and is unique among Japanese prefectural flags for its simple, monochromatic design. It was designed by Toshihide Iguchi, who won a city-wide competition to create the new emblem and flag.