As well as "Fukego," a quotation collection from Tadazane's discourse, Chugaisho is precious because it conveys the real lives of aristocracy at the time including yusoku-kojitsu (knowledge of court rules, ceremony, decorum and records of the past) as well as official court events.
同じ談話者の『富家語』とともに、有職故実・公事を中心に当時の公家社会の実況を伝えて貴重である。