Geki kept the business diary 'Geki Nikki' for future reference; but in the latter half of the Heian period, because the ritsuryo legal code system was loosened and Geki became to keep the matters regarding the official duties in their personal diaries to conceal the matters from outside so as to require the inheritance right of Geki and public authority, Geki consequently declined.
外記の職務日記として「外記日記」が書かれて後日の参考としたが、平安時代後期には律令制の弛緩に加え、外記が職務に関する事項を個人の日記に記して外部に秘して、外記の世襲化と公的権威の付与を促したために衰微した。