Which 1945 declaration did Japan accept before signing its final surrender?

Japan accepted the Potsdam Declaration before signing its final surrender.

The declaration was issued on 26 July 1945 by the United States, the United Kingdom, and China. It demanded the unconditional surrender of Japan’s armed forces and warned of “prompt and utter destruction” if Japan continued the war. The Soviet Union was not yet a signatory when the declaration was issued.

Its terms called for the elimination of militarism, the occupation of selected Japanese territory, the disarmament of Japanese forces, and the limitation of Japanese sovereignty to the home islands and other islands designated by the Allies. It also promised that Japan would not be permanently enslaved as a nation.

Japan initially rejected the declaration publicly. After the atomic bombings, the Soviet entry into the war, and intense internal debate, the Japanese government accepted its terms. Hirohito announced that decision by radio on 15 August, and representatives signed the formal instrument on 2 September.