Shoku Nihongi no relation Emperor Saga
Background
Following the earlier national history Shoku Nihongi (797), in 819 Emperor Saga ordered the compilation of the years since then. Primarily edited by Fujiwara no Otsugu, Minamoto no Tokiwa, Fujiwara no Yoshino and Fujiwara no Yoshifusa, the text was completed in 840.
Much of the text was lost during the Ōnin and Bunmei Wars in the late 15th century. Of the original 40 volumes, only ten currently exist: 5, 8, 12, 13, 14, 17, 20–22, and 24.