SGI members follow the teachings of Nichiren, a Buddhist monk who lived in thirteenth-century Japan. Nichiren's teachings provide a way for anybody to readily draw out the enlightened wisdom and energy of Buddhahood from within their lives, regardless of their individual circumstances.
After Shakyamuni's passing, his teachings became increasingly misunderstood as they spread throughout Asia and beyond. In the 13th century, a Japanese Buddhist reformer, Nichiren Daishonin, declared the Lotus Sutra, taught during the final eight years of Shakyamuni's life, to be the highest and ultimate teaching of Buddhism.
Nichiren taught that all the benefits of the wisdom contained in the Lotus Sutra can be realized by chanting its title [Nam] Myoho-renge-kyo. The universal law of life is expressed as Nam-myoho-renge-kyo; reciting this allows each individual to tap into the wisdom of their life to reveal their Buddha nature.