After Japan surrendered in 1945, more than 6 million Japanese were stranded in various parts of what had been the imperial domain. From 1945 to 1956, thousands of Japanese found themselves in the USSR and mainland China, unable or unwilling to return. Drawing on Soviet, Chinese, Japanese, and Western archives, this article compares Soviet and Communist Chinese policies toward the stranded Japanese. The distinct pathways adopted by the Soviet and Chinese Communist parties during the Chinese Civil War led to significant differences in their approaches to the day-to-day lives of the Japanese, the methods and messages of propaganda they adopted, and their means of handling the repatriation issue. Soviet and Chinese policies toward the Japanese during this uncertain and unsettled decade were shaped less by Cold War ideological and geopolitical alignments than by the legacies of East Asia’s recent wars.