Recent progress in the study of migration history in Japan has cast new light on the influx of Koreans to Japan just after the end of the Second World War in August 1945. Both the Japanese Government and the Supreme Commander for the Allied Powers called this migration illegal entry or smuggling, and tried to suppress it., One important question remains to be solved about this migration; namely; how was it prohibited? Before the Immigration Control Act (1951) was enshrined, and at a time when Koreans in Japan still held Japanese citizenship, how were the authorities able to regard Korean migration to Japan illegal? How did this migration became a political and social problem? Focusing on the legislation process and performance of the law, this article attempts to answer these questions. Politics, legislation, and social interaction all contributed to making the ethnic and legal category of Korean in postwar Japan.

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“你是谁？”：1945-1952 年日本占领区朝鲜“非法入境者”的形成

日本移民史研究的最新进展为 1945 年 8 月第二次世界大战刚结束后朝鲜人涌入日本的问题提供了新的线索。日本政府和盟国最高司令官都称这种移民为非法入境或走私，并试图压制它。这次迁移还有一个重要问题有待解决；即；怎么禁止的？在《出入境管理法》（1951年）颁布之前，在日本的韩国人仍然持有日本国籍的时候，当局如何能够将韩国人移居日本视为非法？这种移民如何成为一个政治和社会问题？本文着眼于立法过程和法律实施，试图回答这些问题。政治、立法、