National Flag Day

What Is National Flag Day?

Every January 27th is "National Flag Day" (国旗制定記念日, Kokki Seitei Kinenbi) in Japan. On the 27th day of the first month of 1870 under the old lunar calendar (February 27 in the modern calendar), the Meiji government formally established the design of Japan's national flag — the Hinomaru (日の丸, "circle of the sun"), a red disc centered on a white background — through the "Commercial Ship Rules" (商船規則, Shōsen Kisoku), Grand Council of State Proclamation No. 57. This formalized what had been Japan's de facto national symbol since the Edo period as the official flag to be flown on Japanese commercial vessels, and by extension as the national flag. The anniversary was established by the Japan National Flag Association (国旗協会).

The Hinomaru: History and Meaning

The red sun disc on white is said to have appeared on fans and warriors' banners long before the modern era, and in the late Edo period the shogunate adopted a white flag with a red disc as the general ensign for Japanese ships. The precise origin is unclear, but the symbolism is deeply rooted in Japan's self-conception as the "Land of the Rising Sun" (日本, Nihon — literally "origin of the sun"). The Hinomaru became the most recognized symbol of Japan to the outside world through the Meiji era and modern period, appearing on everything from warships to Olympic uniforms.

The Flag's Contested Legacy

The Hinomaru's association with Japan's militarist era (1931–1945) has made it a politically sensitive symbol in postwar Japan, particularly in the context of school ceremonies and official government use. The Law Concerning the National Flag and Anthem (国旗及び国歌に関する法律, 1999) formally established the Hinomaru as Japan's national flag and "Kimigayo" as its national anthem in statute — a law that generated significant public debate about the relationship between national symbols, history, and education.

The Flag in Daily Japanese Life

The Hinomaru is flown at government buildings and schools on national holidays and special occasions. Households display the flag on national holidays; sports events, particularly international competitions, are accompanied by flag displays and waving. The international recognition of the Hinomaru — its simple, bold design is among the world's most instantly recognizable national flags — reflects its role as Japan's face to the world.

Fun Facts

• Design simplicity: The Hinomaru's design — a single red circle on white — is one of the simplest of any national flag, making it immediately recognizable from a distance and easily reproduced. The original 1870 specification used a 7:10 ratio with the disc set 1/100 of the width toward the hoist; the 1999 law set a 2:3 ratio with the disc centered.
• Kimigayo: Japan's national anthem "Kimigayo" (君が代) is one of the world's shortest national anthems — just 32 syllables long — with lyrics dating from the Heian period (10th century), making it also one of the oldest.