Which document did Japan sign on September 2, 1945, to formally end hostilities with the Allies?

Japan signed the Japanese Instrument of Surrender on September 2, 1945, to formally end hostilities with the Allies.

The printed agreement recorded Japan's capitulation under the terms accepted by its government. Japanese Foreign Minister Mamoru Shigemitsu signed first for the emperor and government, followed by General Yoshijiro Umezu for Imperial General Headquarters.

Representatives of the United States, China, the United Kingdom, the Soviet Union, Australia, Canada, France, the Netherlands, and New Zealand also signed. The ceremony took place on the deck of USS Missouri in Tokyo Bay and was broadcast around the world.

The Instrument of Surrender should not be confused with the Potsdam Declaration. The declaration issued the Allied terms in July; the instrument signed in September formally implemented Japan's acceptance. The later Treaty of San Francisco, signed in 1951, was a separate peace treaty that came into force in 1952.