>>17943401
Language doesn't determine Ethnicity.
No, they were Koreans from the Korean State of Jin. Just because they had two languages back then doesn't mean they aren't Korean.
Again, Language != Ethnicity
And DNA will tell you otherwise. The latest research from The University of Tokyo even backs that assertion that they are from Korea. The only reason why Japanese are divergent from Korea (their dual ancestry) is their interbreeding with the native Jomon population which were absorbed over time to the point they don't exist.