QUESTION: What are the merits of chanting only the daimoku?

ANSWER: Śākyamuni Buddha appeared in this world to expound the Lotus Sūtra, but He kept the sūtra’s name in secrecy during the first forty years or so of preaching. From the age of about 30 to 70 or so, the Buddha solely expounded the expedient teachings to prepare the way for preaching the Lotus Sūtra. At the age of 72, the Buddha for the first time called for the title of the Lotus Sūtra. Thus, it is incomparably superior to the titles of other sūtras. Moreover, the two Chinese characters of myō and hō (Wonderful Dharma) in the title of the Lotus Sūtra are equipped with the “3,000 existences contained in one thought” doctrine and the “attainment of Buddhahood by Śākyamuni Buddha in the eternal past” doctrine, the essence of the Lotus Sūtra revealed in the “Expedients” chapter and the “Life Span of the Buddha” chapter respectively.

Shō Hokke Daimoku-shō, Treastise on Chanting the Daimoku of the Lotus Sūtra, Writings of Nichiren Shōnin, Faith and Practice, Volume 4, Page 19-20