This paper focuses on the unpublished Nikkō Yōmon-shū or the anthology of essential passages collected by Nikkō (日興筆要文集) Zōzō-Yōmon (雑々要文) in the possession of the Kitayama-Honmonji temple (北山本門寺) , and examines the book, especially centering on its composition and contents.
As a result of the examination, it can be confirmed that the essential passages were cited from various documents such as Buddhist scriptures and other books, as well as Chinese literature and anthologies. Therefore, this book can be viewed as a collection of essential passages, showing them together with diagrams in order to deepen an understanding of Buddhism.
