Which 1945 Allied declaration did Japan accept before formally surrendering in World War II?

Japan accepted the Potsdam Declaration before formally surrendering in World War II.

The declaration was issued on July 26, 1945, by the United States, the United Kingdom, and China. It demanded Japan's unconditional surrender and outlined broad Allied aims, including the removal of Japanese militarism and the limitation of Japanese sovereignty to specified home islands.

The Soviet Union was not an original signatory because it was still officially neutral in the war against Japan when the declaration was released. The Soviet Union declared war on Japan on August 8, 1945, and joined the declaration soon afterward.

Japan initially rejected or did not accept the demand immediately. After the atomic bombings, the Soviet declaration of war, and intense internal debate, the Japanese government notified the Allies on August 14 that it accepted the declaration. Hirohito announced that decision publicly the next day.