Which Allied commander signed Japan’s Instrument of Surrender first for the Allied powers?

Douglas MacArthur signed Japan’s Instrument of Surrender first for the Allied powers.

MacArthur was Supreme Commander for the Allied Powers and presided over the surrender ceremony on September 2, 1945. He signed on behalf of the Allied nations before other Allied representatives added their signatures. Fleet Admiral Chester W. Nimitz signed next as the representative of the United States.

MacArthur’s role reflected his command authority in the Pacific and his appointment to lead the Allied occupation of Japan. After the ceremony, he oversaw the occupation’s military administration, while Emperor Hirohito remained on the throne but lost his prewar status as a divine ruler.

This question concerns the order of signatures, not the identity of the ceremony’s host ship or the date of the signing. The Japanese representatives signed before MacArthur: Foreign Minister Mamoru Shigemitsu for the government and General Yoshijiro Umezu for the armed forces.