You are reading far more into what I'm asking for than I am. Shogun is about more than Japanese history and culture unless you are watching a completely different show; it's also about their interaction with Europeans and the desire to stave off European control; the Europeans Toranaga learned had already claimed Japan as their territory. Blackthorne's primary mission was to defeat the Portuguese.

I never asked for Black people to show up randomly in Japanese culture but to be shown exactly as they were, which was mostly (not exclusively) as slaves. The show is erasing European slavery among ship crews and serving the Jesuit priests (who also engaged in Japanese and Korean slave trading.

The Spanish ships going to Japan had slaves, the Portuguese ships going to Japan had slaves, and the five Dutch ships that originally made up Blackthorne's fleet would have slaves (though they may not have been included in the dozen or so survivors). The Jesuits had slaves.

Ignoring those people that were present is a disservice to history. The influence they had on Japan is that is where they gained their impressions of Black people, by observing the Europeans. If they thought the Europeans were barbarians, they were taught Black people were even less. The fact that Japanese female slaves were sometimes sold to Black crew members was one of the reasons the Japanese ended the sale of Japanese slaves in 1590, ten years before Shogun was set. Korean slavery continued.

So, seeing slaves being treated as slaves is about far more than DEI, which I truly doubt you have an accurate understanding of. It is about not literally whitewashing the European presence in Japan which was an important part of Japanese history in the exact period Shogun was set.