The potsdam declaration issued the ultimatum to japan that it

The correct answer is agreed to surrender immediately to Allied forces

Between July 17 and August 2, 1945, in Potsdam, a German city next to Berlin, the last of the meetings between the Allied Countries took place, with the presence of Joseph Stalin, Soviet leader; the President of the United States, Harry S. Truman; and Winston Churchill, replaced in recent days by Clement Attlee, his successor as British Prime Minister.

Called “The Big Three”, Stalin, Truman and Churchill had as their objective to decide, in those days in the Castle of Cecilia of, what would be done in Germany and in the territories occupied by the Nazis, thus establishing new frontiers in Europe, as well as the influence of the winning powers on the continent. If the fight against fascism and Nazism had united the Allies, the end of the war brought a new scenario in which interests were not only different, but antagonistic. The beginning of the polarization between Soviet Union, communist, and United States, capitalist, was being drawn.

i believe it was the shinto