What was the name of the declaration Japan agreed to accept before its 1945 surrender?

Japan agreed to accept the Potsdam Declaration before its 1945 surrender.

The declaration was issued on July 26, 1945, by the United States, the United Kingdom, and China. It demanded Japan's unconditional surrender and warned of “prompt and utter destruction” if Japan refused. The Soviet Union joined the war against Japan on August 8, after the declaration was issued.

Japan initially rejected or did not formally accept the declaration. After the atomic bombings of Hiroshima and Nagasaki, and the Soviet declaration of war, the Japanese government decided to accept its terms, while seeking assurance that the imperial institution could remain.

The declaration helped establish the political framework for Japan's capitulation. Its terms called for the disarmament of Japanese forces, the removal of militarism, occupation by Allied forces, and a transition toward a peaceful government. Japan's acceptance was announced by Emperor Hirohito on August 15, while the surrender document was signed on September 2.