Hello, ! It's rare to see accurate adaptations of historical facts or different cultures, honestly, I think you shouldn't focus so much on that, since it's a fictional story.
This manga looks quite interesting. In Hive-Con we always welcome posts about manga/anime and in general any kind of content that falls within the geek-otaku theme.
We'll be happy to have you there ๐๐
RE: [Kingdom Manga]: The Inevitable Demise of Kanki (Spoilers Ahead)