What was the formal document signed by Japan at the end of World War II called?

The formal document signed by Japan at the end of World War II was the Japanese Instrument of Surrender.

It was signed on 2 September 1945 aboard USS Missouri in Tokyo Bay. The document formalized Japan’s capitulation and ended hostilities between Japan and the Allied powers.

Representatives signed copies for both the Allied nations and Japan. The Japanese signatories were Foreign Minister Mamoru Shigemitsu and General Yoshijirō Umezu. General Douglas MacArthur accepted the surrender for the Allied powers.

The Instrument of Surrender is sometimes confused with the Potsdam Declaration, which demanded Japan’s surrender in July 1945. The declaration set out terms; the instrument recorded Japan’s formal acceptance of them.