Career
He is credited as one of the collaborative compilers of the Nihon Kōki. He was a minister during the reigns of Emperor Saga, Emperor Junna and Emperor Nimmyō. 788 (Enryaku 7, 2nd month): He received his first court rank.
825 (Tenchō 2): From the rank of Dainagon, Otsugu was raised to the position of Udaijin (Minister of the Right).
832 (Tenchō 9):Otsugu was named Sadaijin (Minister of the Left). 843 (Jōwa 10): Work was completed on the multi-volume Nihon Kōki.
And Otsugu was a significant contributor. Otsugu"s father was Fujiwara no Momokawa.