They are said to be of high value which included the name of era such as 'the first year of Taiho era' (year of 701), the names of ministries such as 'Nakatsukasasho' (Ministry of Central Affairs) and 'Kunaisho' (Ministry of the Sovereign's Household), or the names of high officials at that time.
「大宝元年」という年号や「中務省」・「宮内省」などの官庁名も混じった文書、当時の高官の名前なども書かれており、重要史料であるという。