Who was Japan's first signatory on the 1945 Instrument of Surrender?

Mamoru Shigemitsu was Japan's first signatory on the 1945 Instrument of Surrender.

Shigemitsu was Japan's foreign minister and signed on behalf of the Emperor of Japan and the Japanese government. He signed at about 9:04 a.m. on September 2, 1945, aboard USS Missouri in Tokyo Bay.

The second Japanese signatory was General Yoshijirō Umezu, chief of the Army General Staff. Umezu signed on behalf of Japanese Imperial General Headquarters. Their separate signatures represented the civilian government and the military command structure.

Shigemitsu had previously served as a diplomat and had signed Japan's surrender at the ceremony while using a cane and wearing formal diplomatic dress. After the war, he was convicted by the International Military Tribunal for the Far East, served a prison sentence, and later returned to Japanese politics. His name is sometimes confused with Shigenori Tōgō, another wartime foreign minister.