In the new update, Jinhan which is located at southern Korea is displayed as Japanese culture. I guess this changes based on the theory of "Mimana Nihonfu" (https://nl.wikipedia.org/wiki/Mimana_Nihonfu). Unfortunately, this is totally denied theory around 2010, even from the Japanese academy. Where does this reference come from? Do you know who does support this idea, officially? Japanese far-right party.... the best friend of Neo Nazi.
Seriously guys... check your reference again.