Traditionally, other schools of Nichiren Sect criticize the Sect such as, the theory of 'imitation of the principle image (Nichiren Shoshu Sect)', one of 'Nika Sojo are forged documents,' and one of 'Sandaihiho-sho (Commentary of the Three Great Secret Dharmas) are a forged document theory.'
日蓮宗の諸派は伝統的に、「本尊(日蓮正宗)＝偽作」説と「二箇相承＝偽書」説、さらに「三大秘法抄＝偽書説」等でこの宗派を批判してきた。