This is the theory advocated by Namio EGAMI that in the end of the fourth century, hunting horseback races came from the Continent to Osaka Plain through Northern Kyushu and conquered the dynasty existed to establish a new dynasty.
江上波夫が唱えた説で、大陸の狩猟騎馬民族が北九州を経由して4世紀末頃大阪平野に上陸し、征服国家を打ち立てたとする。