The fourth theory is that as Yamato sovereignty (the ancient Japan sovereignty) was transferred eastward and established there, Takamanohara became the sovereignty's former sphere of influence or the Kyushu region, and Ashihara no nakatsukuni became Kinai region (provinces surrounding Kyoto and Nara).
ヤマト王権の東遷と成立を以て、高天原を旧勢力圏であった九州地方、葦原中国を畿内であるとする説。