The first documentation of Japanese people crossing the Pacific Ocean has been discovered by researchers amongst the Inquisition records in the General Archives of the Nation in Mexico. Three names were found in the document, not written in Japanese but with the word “xapon” (Japan) written after their names.

Lucio de Sousa, a special researcher at University of Evora in Portugal, and Mihoko Oka, an assistant professor at the Historiographical Institute, University of Tokyo found the rare document showing that the three, believed to be slaves owned by a Portuguese merchant named Perez.

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