https://readwrite.com/assassins-creed-shadows-flag-controversy-apology-art-book-japan/

“The Sekigahara Teppo-tai members discussed the matter again. We have asked Ubisoft to remove the image from the Collector’s Edition artbook. I’m not sure if this will be possible, but I’ve contacted Ubisoft through their support.”

The poster went on to note that the flag references leaders of The Battle of Sekigahara, which occurred about 21 years after the setting for Assassin’s Creed Shadows. IGN has images of the flag’s use in the artbook.

Here, though, it’s unquestionably a bad look for Ubisoft, as it appears that western artists went Googling for Japanese battle flags, found one, and had no idea what they were working with, because it was only necessary to get one that looked Japanese.