In January 1908, Yoshiro SAEKI advanced a new theory in his article titled, "A Discussion about Uzumasa" printed in "Chiri Rekishi" (Geography and History) No. 100 (edited by Sadakichi KIDA), this being that the Hata families were Jews who embraced "Keikyo" (Nestorianism).
また佐伯好郎は1908年（明治41年）1月、『地理歴史百号』（主宰　喜田貞吉）に収載の「太秦（禹豆麻佐）を論ず」において秦氏は景教（キリスト教のネストリウス派）徒のユダヤ人であるとの説をとなえた。