Chadwick Boseman 's future as warrior king T'Challa in the Black Panther films is assured. But he's digging into some real world history for a new project, signing up to star in Yasuke . Narcos co-creator Doug Miro is writing the script fro the film, which will follow the first African samurai to serve in Japan. Yasuke was a native of Portuguese Mozambique who was brought to Japan as a slave to Jesuit missionaries. The first black man to set foot on Japanese soil, Yasuke’s arrival aroused the interest of Oda Nobunaga, a ruthless warlord seeking to unite the fractured country under his banner. A complex relationship developed between the two men as Yasuke earned Nobunaga’s friendship, respect – and ultimately, the honor, swords and title of samurai. "The legend of Yasuke is one of history’s best kept secrets, the only person of non-Asian origin to become a Samurai," Boseman says in a statement. "That’s not just an action movie, that’s a cultural event, a...