However, enthronement of the Imperial Prince Atsuyasu whom Teishi bore was interfered by FUJIWARA no Michinaga and the descendants of Naritada fell along with the Nakanokanpaku family.
しかし、定子の生んだ敦康親王の即位は藤原道長に妨害され、成忠の子孫は中関白家と共に没落する。