Excerpts from Books and Wikipedia
"The exchange marked the emergence of Japan from prehistory. . . . Himiko's kingdom was essentially a confederation of thirty tribes, held together by her religious authority. . . . Japanese historians have argued for the last thousand years about the location of Yamatai/Yamaichi. Most believe that Yamatai can be identified as Yarnato, near Osaka in central Honshu, which was the capital by the sixth century." [1001 Days]