Which U.S. president publicly called for Japan's surrender after the Hiroshima bombing?

Harry S. Truman publicly called for Japan’s surrender after the Hiroshima bombing. On August 6, 1945, the United States dropped an atomic bomb on Hiroshima, and Truman addressed the event in a statement later that day.

Truman warned Japan to surrender or face further attacks, describing the new weapon as a force capable of producing unprecedented destruction. His statement was part of the broader Allied effort to compel Japan to accept the terms of the Potsdam Declaration.

Japan did not immediately surrender after Hiroshima. The Soviet Union declared war on Japan on August 8, and the United States dropped a second atomic bomb on Nagasaki on August 9. Hirohito announced Japan’s acceptance of the Allied terms on August 15. Truman remained president throughout the surrender process.