It is said that he associated closely with Tadazane, his older paternal-half brother, and following Tadazane, he took a daughter of Tosa no kami (governor of Tosa Province) FUJIWARA no Morizane, and had FUJIWARA no Naritaka as his legitimate son.
異母兄の忠実に近侍したとされ、忠実と同じく土佐守藤原盛実の娘を妻として、嫡子藤原成隆を儲けている。