Question: sgi why do we chant?
Answer: This chant, Nam-myoho-renge-kyo, is at the core of Nichiren Buddhism, on which the modern Soka Gakkai movement is based. Nichiren Daishonin, a 13th century Buddhist monk, believed the Lotus Sutra, an important scripture in Mahayana Buddhism, was one of Gautama Buddha's vital teachings, holding the key to happiness.