On January 15,1824 (according to the old lunar calendar), Atsuma (Kanetane) was adopted by Atsutane HIRATA, a famous scholar of ancient Japanese literature and culture, got married to Atsutane's daughter Oteu (later she called herself Orise), and changed his name to Atsusane, calling himself Kuranosuke (later he called himself Daigaku), then, he practically became the successor to Atsutane.
文政7年1月15日、兄である篤眞(鐡胤)は縁により国学者平田篤胤翁の養子となり、篤胤の娘おてう（後に織瀬と改名した）と結婚し、名を篤実（あつさね）、通称内蔵助（くらのすけ）のちに大角（だいがく）と改め、篤胤の後継者となる。