Nobleman's seat - Kugyoza

…There are other facilities for storing Imperial treasures within the Imperial Palace, but according to the “Nishinomiya-ki,” the Imperial treasures of successive generations were stored in the Giyoden, the regular Imperial treasures in the Kourindo-sho and Ryoki-den of the Koshoden, and the paper folding screens in the Jiju-den. The West Room was called the Kugyo-za, and served as the seat of the Kugyo when events were held in the Shishinden, and sometimes held banquets when the Emperor was not present. The East Room contained the Minister’s lodgings and the Jyokan-ji, and it is well-known that Zenbuchi Aisei and others held lectures on the “Nihon Shoki” (Chronicles of Japan) here in 878-881 (Gangei 2-5). …

*Some of the terminology used in reference to "Kugyoza" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…内裏内の御物の収蔵施設はこのほかにもあるが，《西宮記》によれば，累代の御物は宜陽殿に，恒例の御物は校書殿の蔵人所と綾綺殿（りようきでん）に，紙御屛風は仁寿殿（じじゆうでん）に収蔵したという。西廂は公卿座とよび，紫宸殿で行事のある際公卿の座となり，また天皇の出席しないときの節宴を行うことがあった。東廂には大臣宿と上官侍があるが，878‐881年(元慶2‐5)に善淵愛成らがここで《日本書紀》の講書(日本紀講筵（こうえん）)を行ったのが有名である。…

※「公卿座」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