What is the origin of the Japanese flag?

Japanese worshiped the sun god, so they regarded the sun as their totem. According to legend, at the beginning of the 7th century, Shoto Kutaishi of Japan wrote in his letter to Emperor Yangdi: "Where the sun comes from, the son of heaven goes to the son of heaven at sunset", which is the embryonic form of Japanese country name. It was not until the second half of the seventh century that the Japanese envoy to the Tang Dynasty changed its country name to "Japan", which means "the place where the sun rises", and then it was used as the official country name of Japan.

Since the mid-19th century, the Sun Flag has gradually become the flag representing Japan, which is what all Japanese ships fly. In 187, it was officially designated as the flag of the Japanese navy.

The red circle of the national flag symbolizes the sun. The national flag of Japan is called the Sun Flag (Hinomaru, ひのまる), which comes from the Japanese word "Sun Maru", which literally means "Sun Circle". It is uncertain when the symbol of the sun circle was first used on flags and slogans.

however, in the 12th century, there was a struggle for power between Minamoto (みなもと) and Taira (たぃら) in the samurai group, and the samurai liked to fold fans (called gunsen in Japanese, お).