When Fuyutsugu died in 828, Otsugu who was udaijin (minister of the right) helped Emperor Junna who was born from FUJIWARA no Tabiko, an older sister of Otsugu's and Otsugu played a central role in politics, however, he was often sick and could not satisfactorily conduct any political work for days.
828年、冬嗣が没すると右大臣だった緒嗣は姉・藤原旅子が生んだ淳和天皇を助けて再び政治の中枢に立つものの病気がちで満足に政務が取れない日々が続いた。