Do you know there was a REAL African Samurai in Japan? He is Yasuke. A muslim from Mozambique. He served the Japanese most famous Shogun Oda Nobunaga in the 16th century (the Sengoku Jidai). This facebook post picked up Yasuke and tells about his well.
Large Scale historical TV Show NHK Taiga Drama picks 16th century very often / the Sengoku Jidai , coz each Daimyo has unique character, they had a lot of such as tactics and an offensive and defensive strategy, win and reveresal in war etc,. In recent years, Kuroda Kanbei of 2013 was story of the Sengoku Jidai and of course there was Yasuke as servant of Nobunaga. Here is the guy on the show.