FUJIWARA no Otsugu, son of Momokawa and younger brother of FUJIWARA no Tabiko (nyogo [a consort of an emperor]) of Emperor Kanmu), took charge of building Heian-kyo (the ancient capital of Japan in current Kyoto) and proposed to suspend punitive expedition to Ezo after he was promoted to sangi at the age of 29.
百川の子で桓武天皇の義弟（姉の藤原旅子は天皇の女御）でもあった藤原緒嗣もわずか29歳で参議に昇進すると、長岡京の後に建設された平安京造宮と蝦夷征伐の中止を進言した。