The term daimoku, literally "title," refers specifically to the title of the Lotus Sūtra (Myōhō-renge-kyō in Japanese pronunciation) or to its invocation, usually in the form "Namu Myoho-renge-kyo." The daimoku was chanted in various liturgical and devotional settings in Japan's Heian period (794–1185) and was later given a doctrinal foundation by Nichiren (1222–1282). It is the central practice of the Nichiren school.
Dolce, Lucia Dora. "Esoteric Patterns in Nichiren's Interpretation of the Lotus Sutra." Ph.D. diss. University of Leiden, 2002.
Stone, Jacqueline I. "Chanting the August Title of the Lotus Sūtra: Daimoku Practices in Classical and Medieval Japan." In Re-Visioning "Kamakura" Buddhism, ed. Richard K. Payne. Honolulu: University of Hawaii Press, 1999.
Jacqueline I. Stone