Potsdam Declaration Day

What Is Potsdam Declaration Day?

Every July 26th is also "Potsdam Declaration Day" (ポツダム宣言記念日, Potsudamu Sengen Kinenbi) in Japan. On July 26, 1945, the leaders of the United States (President Harry Truman), the United Kingdom (Prime Minister Winston Churchill), and China (Generalissimo Chiang Kai-shek) — meeting at Potsdam, Germany — issued the "Potsdam Declaration" calling on Japan to surrender unconditionally or face "prompt and utter destruction." Japan's initial rejection of the declaration (announced by Prime Minister Suzuki Kantarō on July 28 as "mokusatsu," or "treating with silent contempt") preceded the atomic bombings of Hiroshima (August 6) and Nagasaki (August 9), and Japan's ultimate acceptance of the declaration on August 15, 1945.

The Potsdam Declaration's Terms

The Potsdam Declaration set out the terms Japan would be required to accept: the elimination of militarism and the authority of those who had led Japan into war, occupation of Japan until a "peacefully inclined and responsible government" was established, limitation of Japanese sovereignty to the four main islands and minor islands as determined by the Allies, disarmament of Japanese military forces, prosecution of war criminals, and democratic rights for the Japanese people. The declaration promised that Japan would not be "enslaved as a race or destroyed as a nation" — distinguishing Allied intentions from the total destruction some Japanese military leaders feared.

Mokusatsu: The Fatal Statement

Prime Minister Suzuki's July 28 statement — describing the declaration as "worthy of mokusatsu" (黙殺, "to kill with silence" / "to ignore completely") — was a critical moment. Suzuki apparently intended the word to signal that Japan was continuing to consider its options without commenting, but the statement was translated into English as a definitive rejection. Whether a clearer response from Japan would have altered the subsequent events — including the atomic bombings — is one of the most debated counterfactuals of WWII history.

The Declaration's Legacy

The Potsdam Declaration and Japan's acceptance of it on August 15, 1945 formed the legal and political framework for Japan's postwar transformation — the Occupation, the new constitution, the renunciation of war in Article 9, and the establishment of Japan's postwar democracy all flowed from the surrender terms the declaration outlined. July 26th is thus a day that marks not only the end of Japan's war but the beginning of its postwar identity.

Fun Facts

• Soviet entry: The Soviet Union, which had not yet declared war on Japan at the time of the Potsdam Declaration, signed the declaration later (August 8, 1945 — the day it declared war on Japan). The Soviet entry into the Pacific War on August 8th was one of the factors that, alongside the atomic bombings, accelerated Japan's decision to surrender.
• The Emperor's role: Emperor Hirohito's personal decision to accept the Potsdam Declaration — overruling military leaders who wanted to continue the war — was communicated through the August 14-15 "Jewel Voice Broadcast" and is credited with preventing an even more catastrophic defense of the home islands.