Japan

The symbol in the centre of the "Hi-no-maru" (the Japanese national flag) is the state "Mon" or emblem. It has been the state symbol of Japan for centuries. The flag became the National Flag following the Meiji Restoration in 1868. It never had rays.
Graham Bartram - 09 November 1998

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In 1999, Japan adopted new legislation on the national flag. The legislation set an official national flag with 2:3 proportion, and the sun disc at 3/5 of length in the center with BENI-IRO on white field.

A long time dispute was concluded on which flag should be official/legal national flag whether decree no 651 of Oct 3, 1870 (2:3, 3/5, in the center) originally legislated for the Japanese Naval flag or decree no 57 of Jan 27 1870 (7:10, 3/5, 1/100 towards hoist) originally legislated for the Japanese Merchant flag.

 

Comparisons of old and new flag decrees
(Click on image to enlarge)

	Decree No 127 (1999)	Decree No 57 (1870)
	by Antonio Martins	by Antonio Martins
Overall proportion	2:3	7:10
Placement of sun disc	centered	1/100th towards the hoist
Size of the sun disc	3/5 of length	3/5 of length

Nozomi Kariyasu, 5 August 1999, 22 January 2000

From: Japan: an illustrated encyclopedia Vol. 2 (M-Z):

national flag

(kokki). The national flag of Japan has a crimson disc, symbolizing the sun, in the center of a white field. It is popularly known as the Hinomaru (literally, "sun disc"). It is said that at the time of the Mongol Invasions of Japan (1274 and 1281) the priest Nichiren presented a sun flag to the shogun. The Tokugawa shogunate (1603-1867) adopted the flag for its ships in the early 1600s. In the mid-19th century the shogunate decreed that all Japanese ships fly flags with the sun on a white field. In 1870 the Meiji government officially designated it for use on Japanese merchant and naval ships. It has never been officially designated as the national flag; however, it has become so by customary use. The "rising-sun" flag with 16 rays used by the former Japanese navy and by the present Maritime Self Defense Forces is a military service flag and should not be confused with the national flag.

Beside a drawing of the flag is the following text:

The design and proportions of Japan's national flag were fixed in 1870 by the Meiji government. The vertical to horizontal ratio was set at 2:3, the disc was to be placed at the exact center, and the diameter of the disc was to equal three-fifths of the vertical measurement of the flag.

Marcus Schmöger, 27 August 2001

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The name of Nichiren means the sun and lotus in English (Nichi = Nihon = the sun; Ren = lotus ) and the lotus is a typical symbol of Buddhism. That is why he gave the sun (and lotus) to the Shogun who at that time was politically opposed to the Emperor (who was a God in Shintoism). Nichiren is said the greatest Buddhist in Japan because a majority of Japanese are not Shintoist but Buddhist. The Nichiren was formed his organization which is now called Soka-Gakkai whose political part is Komei-tou which is composed of the present Japanese cabinet.

I think he believed his flag could help the Shogun, who had military power, to save Japan and the people from Mongol Invasion. He could not find any reason for him to give his flag to the Emperor who is believed the God and son of the Sun but who had no ability to defeat Mongolian.
Nozomi Kariyasu, 29 August 2001

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Nichiren's purpose was to motivate the political powers to abandon the more popular Buddhist sects and to accept the Lotus Sutra as the one sure way to save Japan. His was a religious and philosophical movement, not a political one. At the same time he issued to the government a treatise entitled "Rissho Ankoku Ron" which predicted great disaster for Japan should they not retreat from the heretical (popular) Buddhist sects and accept his teachings.
Bruce Ward, 2 September 2001

The Prime Minister's Proclamation No. 57 issued on January 27 in the 3rd Year
of Neiji (1870):
Regulations of Merchant Ship (abridged)

1. The national flag:
   This shall not be removed and even a ferryboat shall keep it hoisted.
   Hoist it at 8 a.m. every morning and haul it down at sunset every evening.
   In case of non-hoisting of the national flag it is customary of the
international law that no plea is justified it treated as pirates.
2. The dimensions of the national flag:
   The ratio of the hoist and fly 7:10.
   The diameter of the disc: three fifths of the hoist length of the flag
locating in the center.

Regulated as above for strict observances.

                                        Ministry of Home Affairs
                                        Ministry of Foreign Affairs

Source: Japanese National flag - Japanese National symbol Marks. Tokyo: Kokki Kyokai (National Flag Association), circa 1970. p. 3.
Jos Poels - 18 January 1996

A red disk bordered with white.

Just to mention, Military Aircraft Insignia of the World explains that such a roundel was used since the establishment of Japanaise military aviation. It mentions that sometimes the disk was also bordered yellow, and that on the Home Defence aircrafts in 1944-45 the red disk was on white square field. After the surrender in 1945, the Allies prescribed that all Japanese aircrafts have their roundels painted white with green cross throughout.
Željko Heimer, 4 March 2002

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The Japanese Air Force was formed in 1911 and a year later a naval air arm was formed. After a period of no military aviation in Japan, the Japan Air Self-Defense Force (Nihon Koku-Jieitai) was formed on 1 July 1954 together with Japan Maritime Self-Defense Force (Kaijyo Jieitai) and Japan Ground Self-Defense Force (Rikujo Jieitai) with their air arms.
Dov Gutterman, 18 June 2004