Many of his remaining handwritten books in existence today at Ishiyama-dera Temple are referred to as 'Nioi-no Shogyo' (the Fragrant Scriptures) that are collectively designated as a national treasure.
彼の自筆本は今も石山寺に多数残存し、「匂いの聖教（においのしょうぎょう）」と呼ばれ、一括して国宝に指定されている。