In the reign of Emperor Kinmei, HATA no Otsuchi became Tomo no miyatsuko (the chief of various departments of the Yamato Court) and was appointed Okura no jo (a financial official), and the heads of family seem to have served as financial officials of the Yamato Court.
欽明天皇の時代には秦大津父（おおつち）が伴造となり大蔵掾に任ぜられたといい、本宗家は朝廷の財務官僚として活動したらしい。