Nichiu's disciples have recorded his oral teachings in a number of writings, such as "Nichiu-shi Kegisho" (the way of teaching as preached by the Rev. Nichiu), "On-monogatari Chomon-sho" (the written record of oral teachings), "Renyobo Kikigaki" (the written record of oral teachings produced by Renyobo) and "Shimotsuke Ajari Kikigaki" (the written record of oral teachings produced by a senior priest of Shimotsuke Province), to systematize 'kegi' (the way of teaching and inspiring people) of Fujimonryu (a generic name covering a number of the Nichiren sects of Buddhism).
富士門流の化儀方式を体系づけて、「日有師化儀抄」、「御物語聴聞抄」、「連陽房聞書」、「下野阿闍梨聞書」などとして弟子たちが筆録している。