When Yasuke was presented to Oda Nobunaga, the Japanese Daimyō thought that his skin must have been coloured with black ink. Nobunaga had him strip from the waist up and made him scrub his skin. These events are recorded in a 1581 letter of the Jesuit Luís Fróis to Lourenço Mexia, and in the "1582 Annual Report of the Jesuit Mission in Japan," also by Fróis. These were published in "Cartas que os padres e irmãos da Companhia de Jesus escreverão dos reynos de Japão e China II" (1598), normally known simply as "Cartas." When Nobunaga realized that the African's skin was indeed black, he took an interest in him.