Nichiren Buddhism.

Nichiren Buddhism is a Japanese Buddhist tradition founded by Nichiren (1222–1282) that centers on exclusive devotion to the Lotus Sutra. Nichiren taught that the Lotus Sutra reveals the universal potential for enlightenment and provides the most effective path in a degenerate age. The core practice is chanting Namu Myoho Renge Kyo, the title of the Lotus Sutra, as an expression of faith and a means of realizing buddhahood in this life, often linked to strong commitments to social and ethical engagement.