That means the Japanese flag?
Officially his name is Nisshōki (日 章 旗, banner shaped sun disk) but is more known as the Hinomaru (日 の 丸, solar Disc) , representing the rising sun. Political change during the years 1866 to 1869 , takes center stage Hinomaru to be used by the Imperial Japanese Navy and later by the Japanese Empire.
The white means innocence of the Japanese and the red circle symbolizes courage and progress. The origin comes from Omikami Amaterasu , the sun goddess in Japanese mythology and symbol of the Japanese imperial family . From 1889 high as 1945 (end of the Second World War) national flag of Japan becomes the Kyokujitsu-ki (旭日 旗, Flag of the Rising Sun ), is also used by the naval fleet of the Japanese army, with the varying the position of the sun.
The Japanese Empire , also known as the Empire of Great Japan Imperial Japan lasted from 1868 to 1945, until the surrender at the end of World War II (WWII ), in this period of time Japan is mainly spread in the wars sino-japanese to conquer current Koreas and the russo-japanese war to dominate the region of Manchuria (now China). Upon entering World War I (WWI ) won the Marshall Islands, Palau Carolines, Marianas Micronesia hit dominated by Germany. During World invade the Philippines, Guam, Wake Island, Midway Islands, Hong Kong, Malaysia, Thailand, Burma and Vietnam.
The Kyokujitsu-ki and the Hinomaru was severely prohibited during the first years of the North American occupation , until early 1949 when all restrictions were abolished and the Hinomaru was first used normally. Currently the Kyokujitsu-ki is the land army flag of Japan.
The imperial flag Kyokujitsu-ki in the West is viewed with indifference , you can see in shirts and sweaters but in the East it is not, especially in the neighboring countries of Japan, where it is seen as an imperialist and fascist symbol. The Hinomaru is also a matter of discussion , because for some still represents the extreme nationalism and day today is used sparingly . On the other hand, the Japanese are not willing to change the current flag for any other.