In relation to the various religious doctrines which became diversified after the death of Nichiren (日蓮), the viewpoint of Honjaku theory (本迹論) is the most important index to examine the characteristics of the disciples. Kōzōin Nisshin (広蔵院日辰, mid-16th c.), who was based in Kyoto during the Sengoku Period, was a notable learned priest who established a major theoretical system of the Honjaku theory. Nisshin discriminated between Honmon (本門) and Shakumon (迹門). The distinctive feature of the theory is that it discusses the superiority of “Chapter 16, Nyorai Juryō-hon (如来寿量品第十六)” out of the 28 chapters of the Lotus Sūtra. In this paper, in order to clarify the characteristics of the Honjaku theory of Nisshin, I compare it with the theory of the Icchi school (一致派) priests who discussed the unity of the Honmon and Shakumon. I took up as my starting point the contention shared by the learned priests of the Shoretsu (勝劣) and Icchi schools, that is, the interpretation of “Myōhō 妙法” in the first introductory chapter. The teachings of the abovementioned priests strongly reflect the characteristics of the doctrines that they upheld. Here I point out that Nisshin interprets this “Myōhō” of the title of the introductory chapter based on the sixteenth chapter.
