Yasuke

He came from Africa and fought alongside a mighty feudal lord in brutal 16th century Japan. They called him the Black Samurai, and he became a legend.

The anime opens in the midst of a waning victory in a battlefield of swordsmen soldiers, archers, mechas, and magic. As the war storm rages, an armored Yasuke (LaKeith Stanfield, also executive producer) witnesses his lord commit seppuku. Two decades later, the former samurai exists as a recluse with barely a purpose. He has sunk into his role as a sullen boatman in a small village, but he is amiably approachable enough that village kids can expect him to toss them his fish catch or pass them swordplay tips. But soon, circumstances drag him back into honor-bound duty when a mother (Gwendoline Yeo) implores him to ferry her frail daughter Saki (Maya Tanida), ridden with mysterious magic she cannot control, to a special doctor. Yasuke’s honor and abilities are put to the test.