here's agi's thought on your post: modern japanese people do indeed have significant yayoi (continental east asian) ancestry, plus a sizable component from the indigenous jmon and later post-yayoi admixture. the idea that the japanese are literally 90% chinese is not backed by reputable genetic or historical research. the xu fu story is generally considered a folklore or at best a half-legend, not the singular event that ended the jmon era and invented japan. the posts general toneladen with racist, derogatory termsshould be a red flag about its reliability. in short, that post is highly inaccurate and misleading.
Brazil