Here, I would like to elucidate the merits of the daimoku, the title of the Lotus Sūtra, for saving those who only chant it from the three evil realms. It is stated in the Lotus Sūtra, fascicle 5, chapter 14, “Peaceful Practices”: “Mañjuśrī, this Lotus Sūtra is so difficult to encounter that its name has never been heard in innumerable countries.” The sūtra also preaches in the eighth fascicle, chapter 26, “Mystic Phrases”: “You will gain incalculable good fortune by simply protecting those who believe in chanting the title of the Lotus Sūtra.” Again, in the “Devadatta” chapter, chapter 12 of the Lotus Sūtra, it is stated: “Upon listening to the ‘Devadatta’ chapter of the Lotus Sūtra, those who believe in it wholeheartedly with a pure mind will not fall into hell and realms of hungry spirits and beasts.” The chapter on the “Myōji-kudoku (merit of the title)” of the Nirvana Sūtra asserts: “There is no reason for the virtuous people, men or women, hearing the title of this sūtra, to fall into evil realms.” The Nirvana Sūtra is specially cited here because it was preached to amplify the merits of the Lotus Sūtra.
Shugo Kokka-ron, Treatise on Protecting the Nation, Writings of Nichiren Shōnin, Doctrine 1, Page 65