SUGANO no Mamichi, AKISHINO no Yasuhito and NAKASHINA no Kotsuo added six more volumes to the work, which covered the incidents that had occurred before 791 in the reign of Emperor Kanmu, thus brought the total to 20 volumes.
菅野真道、秋篠安人、中科巨都雄は、さらに6巻、すなわち桓武天皇の治世のうち延暦10年（791年）までを加え、全20巻とした。