Now, as far as my theology goes, I would like you to think that what I have expressed before being banished to Sado Island can be equated with the forty or so years in which Śākyamuni had taught before revealing the Lotus Sūtra (that is, the truth and true aims of the Buddha were not directly divulged in those years). If the ruler of this country desires to govern the people under a proper political principle, then there will always be an opportunity for me to debate with the priests of the Shingon Sect. I shall expound my precious teaching for the first time then. Even if I had discussed this only within the circle of my disciples, some of it would bound to have leaked out making it difficult to conduct a discussion (as a result of their scheming). Such is why I have kept quiet about this to all of you. However, ever since the night of the twelfth of the ninth month in the eighth year of the Bun’ei Period (1271), when I was about to be beheaded at Tatsunokuchi (on the outskirts of Kamakura), I have come to think that it was unwise of me to have kept the truth from some of you who have stuck with me. There is a teaching I have disseminated quietly from the island of Sado (where I had been banished) to my disciples.

This is a teaching which great commentators in India and great masters in China and Japan who have come after the Buddha, such as Kāśyapa, Ānanda, Nāgārjuna, Vasubandhu, T’ien-t’ai, Miao-lê, Dengyō and Gishin, knew to be true in their hearts but never imparted. This is because the Buddha had strictly warned that, “this important teaching should not be passed on in the thousand years of the Age of the True Dharma and thousand years of the Age of the Semblance Dharma before entering the Latter Age of Degeneration.” Nichiren is not a direct emissary of the Buddha; however, as long as I have come to be in this Latter Age of Degeneration and have, quite beyond expectations, attained this doctrine, I would like to transmit it in the capacity of a herald, until Bodhisattva Superior Practice, a messenger of the Buddha, appears. Once this teaching is exposed, the teachings spread by the elders during the Ages of the True Dharma and Semblance Dharma would pale in comparison, just as the stars are obscured by the rising sun, or as if we see a dull performance after a skillful one. It is written in the sūtras that when the Latter Age of Degeneration dawns, such things as the spiritual power of Buddhist sculptures and priests of the temples built in the Ages of the True and Semblance Dharmas would be effaced; and its only legacy would be the dissemination of this great teaching throughout the world (Jambudvipa). All of you should feel grateful that you are endowed with the opportunity to have come across such a wonderful teaching.

Misawa-shō, A Letter to Lord Misawa of Suruga, Writings of Nichiren Shōnin, Doctrine 2, Page 241-242.

The Introduction to this letter provided by the translators offers this:

This letter represents a vital piece of evidence provided by Nichiren himself upon which many scholars rely in supporting the fact that there exists a difference in Nichiren’s revelation of doctrines and intensity of teaching before and after his Sado exile.

Something to consider as I continue through the 100 days of study.