In the Lotus Sūtra, after forty some years [wherein the other sūtras taught that women could not attain Buddhahood,] a woman at last attained Buddhahood; and even Devadatta, who was called an icchantika who broke the five rebellious sins, attained Buddhahood. Thus, there is no doubt that in this evil age those monks, laymen, nuns, and laywomen who are icchantika because they have broken the five rebellious sins and slandered the Dharma, will all attain Buddhahood through the Lotus Sūtra. Moreover, we must trust these words from fascicle seven of the Lotus Sūtra:

After my passing
He who upholds this sūtra
Will attain the Buddha Way
Definitely and without a doubt.

Minobu-san Gosho, Mt. Minobu Letter, Writings of Nichiren Shōnin, Volume 5, Page 131