Kuji had been carried on based on the decree such as 'Engishiki (an ancient book for codes and procedures on national rites and prayers)' or various official or personal ceremonial books regarding 'Jogan gishiki (ceremony in the manner of Jogan period)', 'Saikyuki (record of court practices and usage, written by MINAMOTO no Takaaki in Chinese style)' or 'Hokuzansho (a representative book of ceremonies for the Heian period written by FUJIWARA no Kinto)' by court nobles including shokei (court nobles who work at Imperial Court as high rank post) who served as bugyo (administrator), and government officials such as Benkan (a controller of the Oversight Department), Geki (Secretary of the Grand Council of State) and Shi (recorder) (the risturyo system) who provided with clerical assistance, under the sponsorship of Emperor or Chiten no kimi (the retired emperor in power).