As for the origin and lineage of Emperors around this period, there is also a theory stating that it was not 'bansei ikkei' (an unbroken line) like described in the Kojiki (Records of Ancient Matters) and the Nihonshoki (Chronicles of Japan), but had complex movement of powers in behind and between the powerful local ruling families in various places inside Wakoku.
この頃までの代々の天皇の出自や系統については、記紀の記述通りの「万世一系」ではなく、倭国内各地の有力豪族の間での、複雑な権力移動が裏にあったのではないかという説もある。