He was the first Black Japanese Samurai in history and he was essentially one of the ‘Right Hand Men’ of the war lord of 16th century Japan: Oda Nobunaga.
Yasuke (彌介) is what they called him, we are not too sure of his actual name but a recent discovery in a 2013 investigation by Discovery of the World’s Mysteries (世界ふしぎ発見) concluded that Yasuke was a Makua named Yasufe. (Makua is the largest ethnic group in Mozambique).