In his 'Kamakura denchu mondo,' he described how his mentor Nichiin won the debate when arguing against all sects in the inside of the palace of Kamakura bakufu (the Seii taishogun of the time was Imperial Prince Morikuni, and the regent was Takatoki HOJO).
師日印が鎌倉幕府（時の征夷大将軍は守邦親王、執権は北条高時）の殿中で全宗派を相手に論破勝利したことを「鎌倉殿中問答」として執筆した。