In his son FUJIWARA no Teika's "Ogura Hyakunin Isshu" (Ogura's Sequence of One Hundred Poems by One Hundred Poets), Toshinari is engaged as Kotaigo gu no daibu, but with him there was an intensification of political/economic contradictions in society, a shift to the middle ages where the warrior families took back political control; the period was marked by upheaval and the Mikohidari family cemented its name as poets.
息子藤原定家の『小倉百人一首』には皇太后宮大夫俊成として採られるが、彼とともに社会が政治・経済的矛盾が深まる中、武家が政権を奪取する中世へ移行する、時代の激動期を生き抜き、歌の家としての御子左家の名を確立した。