For the project of compiling an official history on the reigns of two emperors, Emperor Uda and Emperor Daigo, an agency called the History Compilation Bureau was established during the reign of Emperor Suzaku in 936, and FUJIWARA no Tsunesuke and TAIRA no Koremochi were appointed as its betto (superintendents), and OE no Asatsuna was appointed to be their aide.
宇多天皇・醍醐天皇2代の出来事を扱った正史編纂事業は、朱雀天皇の承平(日本)6年（936年）に撰国史所という機関が設けられて藤原恒佐・平伊望が別当に任じられ、大江朝綱らを補佐にあてた。