That wikipedia was altered by a Ubisoft consultant, an English, on Japanese history, in particular on Yasuke. After he published a book on the black samurai, he altered the wikipedia.
Knowing the backlash, Ubisoft changed the Japanese description of Yasuke from "legendary samurai" to "warrior worth a thousand".
In the latest development, Yasuke is removed from the promotional material. Ubisoft delayed the game two times for months, spending extra 20 mil euro to tone down the Yasuke's role in the game. Now essentially making the female sinobi Naoe the main protagonist.