Kinrikoban - Kinrikoban

...According to official orders, government officials of higher ranks, except ministers and ministers of various ministries, were required to be on duty at the honji (night and day shifts), but records from the Heian period show that at the Imperial Palace and the Imperial Palace, nobles and courtiers were on duty, with most of these being on duty every six days or five days in a row. The Imperial Palace Guard, which was established in the Middle Ages and survives into the early modern period, has had 10 guards, but most are 5 or 6. According to the Gokeikyoki, there was a system of 5-guard inner Guards and a system of 6-guards, and as a rule, nobles and courtiers below the rank of Dainagon, except for samurai, military officers, and benkan, including those with no rank, were assigned to one of these guards.
[Samurai Government and Guards]
The Dairi-Oban guard service, which symbolizes the daily national guard duties, is thought to have begun in the Insei period, but the method of guarding the Imperial Palace in its early days has not yet been clarified.

*Some of the terminology that refers to "Kinri Koban" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…なお公式令によると，大臣以上と諸省の卿を除く長上の官人も，本司に分番して宿直（とのい）(宿直と日直)することを義務づけられているが，平安時代の記録類によると内裏や院御所では公卿･殿上人などの当番宿直が行われ，これには6日ごとの勤番と5日連続の勤番が多い。中世に整備されて近世にも存続する禁裏小番は，10番の事例もあるが5,6番が多く，《言経卿記》によると，5番制の内々小番と6番制の小番とがあって，武士と武官･弁官を除く大納言以下の公卿･殿上人は，散位をも含めて原則としていずれかの番に編入されている。
［武家政権と番役］
　日常的な国家警備役の象徴となる内裏大番役は，院政期に始まると考えられているが，その初期の上番方式はまだ明らかにされていない。…

※「禁裏小番」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報