Back then, an idea stating that not only one blood line succeeded the throne of Wakoku, but the throne was succeeded in between plural powerful ruling families (theory of joint sovereignty) can also be seen.
当時は、一つの血統が倭国王位を継いだのではなく、複数の有力な豪族たちの間で倭国王位が継承されたとする考え（連合王権説）も見られる。