Nine Allied governments had representatives sign Japan's surrender document in Tokyo Bay.
The signatories represented the United States, China, the United Kingdom, the Soviet Union, Australia, Canada, France, the Netherlands, and New Zealand. General Douglas MacArthur signed first for the Allied powers as Supreme Commander, followed by representatives of the nine governments.
The order of signatures reflected the broad coalition that had fought Japan. Chester Nimitz signed for the United States, Hsu Yung-chang for China, and Bruce Fraser for the United Kingdom. Soviet, Australian, Canadian, French, Dutch, and New Zealand representatives then signed in sequence.
The number can be confused because more than nine Allied people were present and many other Allied ships surrounded Missouri. The question concerns governments with official representatives who signed the instrument, not every country that contributed personnel or vessels to the war effort.