>>507607053
Long story short on those, 3rd to 5th century construction, first emperor's following the Yamato period (meaning Yayoi and Jomon people in that region had likely already interbred a good deal).

So basically the Japanese government refuses to have them investigated because it will probably show more "Korean" (once again, proto-Korean/Manchu) influence on early Japan, also genuinely scared that if DNA testing is done it will show some of the first Japanese Emperor's,.aka direct ancestors of the Emperor today, are Korean kek.

Which brings me back to the original point of, history is never about truth or discovery for these people. It's about one saying "we were first!" To make the other two seethe.

Pic related is one I took personality of the kofun btw about 2 months ago