History of the Japan Flag: Hinomaru Tradition and the 1999 Flag Law
Japan’s red sun disc has roots far older than its modern flag law. The Hinomaru was used for centuries before its national status was formally codified in 1999.
Why the sun became a Japanese symbol
Sun imagery has deep roots in Japanese political, religious and cultural tradition. Japan’s geographic identity as an eastern “land of the rising sun” reinforced the association.
Hinomaru before modern law
Red sun-disc banners were used in Japan long before the modern nation-state. By the nineteenth century, the Hinomaru had become increasingly associated with Japanese ships and national representation.
Meiji-era national use
During the Meiji period, regulations standardized the sun-disc design for official maritime use and helped establish it as Japan’s de facto national flag.
20th-century continuity
The Hinomaru continued to serve as Japan’s principal national flag through the imperial, wartime and postwar eras, although its historical associations have sometimes made public debate around the symbol politically sensitive.
1999: legal national-flag status
The Law Regarding the National Flag and National Anthem formally established the Nisshōki/Hinomaru as Japan’s national flag in 1999.
What did the 1999 law standardize?
The law defines a white field with a deep-red sun disc centred on the flag. The ratio is 2:3 and the disc diameter is three-fifths of the flag’s height.
Why Hinomaru and Nisshōki are both used
Nisshōki is the official name, while Hinomaru is the familiar everyday name meaning “sun disc.”
