If we follow the theory that Yamatai Koku (Yamatai Kingdom) was in northern Kyushu based upon "Gishiwajinden" (literally, an 'Account of the Wa' in "The History of the Wei Dynasty"), the power should have been shifted from the Kyushu to the Yamato kingship.
『魏志倭人伝』の邪馬臺國が北部九州に在ったとする説をとると当然ながらその後、九州からヤマト王権への権力の移動がなければならない