The African Samurai.
Very little is known about the man named Yasuke. He was more than likely from Mozambique, or South Sudan, as he was, by all known accounts, a very tall and very dark African man. He arrived in Japan as a slave in 1579, but would die as the first African Samurai, highly respected by the daimyō (Fuedal Lord), Oda Nobunaga.
When he arrived in Kyoto with a handful of other African slaves, it was the first time most Japanese people had ever seen a black man. 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. Nobunaga took an interest in him when he realised his skin was indeed dark.
Yasuke and the Fuedal Lord had several meetings together, where Nobunaga was impressed by the discipline and strength of the African. Yasuke would officially be initiated into the service of the Lord, the only non-Japanese retainer of Nobunaga. Yasuke was taught Japanese and the culture of their people, and would be allowed to continue to travel with the Portuguese missionaries who had brought him over.
Yasuke was mentioned in the prototype of Shinchō ki, the archives of the Maeda clan of the 16th century. According to this, "the black man named Yasuke was given his own residence and a short, ceremonial katana by Nobunaga. Nobunaga also assigned him the duty of weapon bearer."
Yasuke even fought side by side with Nobunaga in 1582 against rival forces, where Nobunaga was defeated and forced to commit sepuku (suicide by sword) and Yasuke was ultimately captured. After this, there is no further information as to his fate. More than likely, he was executed.