Yoshitsugu and Momokawa also each married their daughters, FUJIWARA no Otomuro and FUJIWARA no Tabiko, to Imperial Crown Prince Yamanobe (who later became Emperor Kanmu) and directed Kokyu (empress's residence) policies.
また、彼らはそれぞれ自分の娘（藤原乙牟漏・藤原旅子）を皇太子山部親王（のちの桓武天皇）の妃とし後宮政策も行った。