The primary color of the flag of Japan is white, featuring a red circle in the center, which represents the sun. Known as the "Nisshoki" or "Hinomaru," the flag has a design that is very simple yet deeply symbolic. The red circle signifies the sun, an important symbol in Japanese culture and mythology. The flag has been in use in various forms since the 7th century, with its current design officially adopted in 1854. The simplicity and striking contrast between red and white evoke national pride and unity for the Japanese people.