QUESTION: Which is superior, the Lotus Sūtra or the Nirvana Sūtra?

ANSWER: The Lotus Sūtra is.

QUESTION: Why do you say that?

ANSWER: In the Nirvana Sūtra the Buddha Himself declared, “Eight thousand śrāvaka were guaranteed to be future Buddhas in the Lotus Sūtra. It is as though a great harvest was reaped in autumn and stored in the warehouse for winter, leaving nothing else to be done in the Nirvana Sūtra.” Again, it is said in the “Teacher of the Dharma” chapter in the Lotus Sūtra that the sūtras to be preached, like the Nirvana Sūtra, are not as difficult to believe and understand as the Lotus Sūtra is. This means that the Nirvana Sūtra is not as truthful as the Lotus Sūtra.

Shugo Kokka-ron, Treatise on Protecting the Nation, Writings of Nichiren Shōnin, Doctrine 1, Page 11-12