As an evidence for the theory, it is said that the haniwa there were baked in the Shinike remains as those in the Imashirozuka tumulus, said to be the true tumulus of Emperor Keitai
その証拠としては、埴輪が継体天皇の真陵と言われる今城塚古墳と同じく、高槻市の新池遺跡で焼かれていることが挙げられる。