What was the Japanese surrender document signed in Tokyo Bay on September 2, 1945 called?

The document signed in Tokyo Bay on September 2, 1945, was called the Japanese Instrument of Surrender.

It was the printed legal agreement that formalized Japan’s capitulation and ended hostilities with the Allied powers. Japanese representatives signed it aboard USS Missouri, followed by representatives of nine Allied governments. General Douglas MacArthur signed first for the Allies.

The document required Japan to accept the provisions of the Potsdam Declaration, obey the orders of the Emperor and Japanese government to surrender, and ensure that Japanese forces ceased operations. It also placed the Emperor and government under the authority of the Supreme Commander for the Allied Powers.

Two principal copies were used at the ceremony: a leather-bound version for the Allies and a canvas-backed version for Japan. The Allied copy was later taken to Washington, D.C., and is held by the U.S. National Archives.