The Soviet Union was represented by General Kuzma Derevyanko at Japan's September 2, 1945 surrender ceremony.
Derevyanko signed the Japanese Instrument of Surrender after representatives of the United States, China, and the United Kingdom. He was a lieutenant general in the Red Army and signed on behalf of the Soviet Union, which had entered the war against Japan on August 8, 1945, with hostilities beginning the following day.
The Soviet declaration of war and its invasion of Japanese-held territory in Manchuria became part of the rapidly changing strategic situation that preceded Japan's surrender. The Soviet representative's presence at the ceremony demonstrated that the surrender involved the wider Allied coalition, not only the United States and Japan.
The Allied signatories also included representatives from Australia, Canada, France, the Netherlands, and New Zealand. Derevyanko's name is sometimes confused with those of other Soviet commanders involved in the final Pacific operations, but he was the official Soviet signatory aboard USS Missouri.
The ceremony itself formalized the surrender on September 2, while the emperor's public announcement had occurred in Japan on August 15.