The imperial flag of Japan options a ordinary red circle on a white history, is called the Nisshoki or Hinomaru

https://weekly-wiki.win/index.php/The_American_Flag%27s_Journey:_Historical_Milestones_and_Design_Changes

The imperial flag of Japan characteristics a useful pink circle on a white heritage, is named the Nisshoki or Hinomaru, representing the solar and embodying Japan's cultural identification and historical magnitude in Asia.