At present, a theory by Mineo KAIHO and Iwao ENDO that Ezochishimao Kasha was the Ando clan, a theory by Shosuke MURAI, Kimiaki TAKAHASHI and others that the envoy was fake on the premise of existence of the Ando clan, and a theory by Setsuko OSA that a fake envoy was sent by people of Tsushima Island exist concurrently.
現在は海保嶺夫、遠藤巌の安東氏説、村井章介、高橋公明らによる安東氏の存在を前提とした偽使説、長節子による対馬島人による偽使説が並立している。