Japanese declaration of war on the United States and the British Empire
The Imperial edict of declaration of war by the Empire of Japan on the United States and the British Empire (Kyūjitai: 米國及英國ニ對スル宣戰ノ詔書) was published on 8 December 1941 (Japan time; 7 December in the US), 7.5 hours after Japanese forces attacked the United States at Pearl Harbor and British forces in Malaya, Singapore, and Hong Kong. The declaration of war was printed on the front page of all Japanese newspapers' evening editions on December 8.