This includes many varieties of historical documents such as those related to Shoen (manor), that are very important not only for the history of economics and Buddhism, but also for the whole study of Japanese history.
荘園関係文書をはじめとして、多岐にわたる文書が含まれ、経済史、仏教史のみならず、日本史研究全般にとって貴重な史料を多く含んでいる。