Eight Allied nations besides the United States were represented by signatories at Japan’s formal surrender ceremony.
The ceremony aboard USS Missouri included representatives from China, the United Kingdom, the Soviet Union, Australia, Canada, France, the Netherlands, and New Zealand, in addition to the United States. General Xu Yongchang led the signing representatives after MacArthur and Nimitz.
The signatories reflected the broad coalition that had fought Japan across Asia and the Pacific. Admiral Bruce Fraser signed for Britain, General Kuzma Derevyanko for the Soviet Union, and General Philippe Leclerc de Hauteclocque for France.
The figure eight can be confusing because the ceremony involved many ships and personnel from other Allied countries as well. The question refers specifically to nations with official signatories on the surrender document besides the United States.