Soka Gakkai Singapore (SGS), formerly known as the Singapore Soka Association (SSA), is a constituent organisation of the Soka Gakkai International, a lay Buddhist organisation comprising some 12 million members in 192 countries and territories. 

The Buddhist practice of SGI members has its origins in 13th-century Japan, when the core practice of chanting Nam-myoho-renge-kyo was established by Nichiren (1222-82), a reformist Buddhist monk. Nichiren identified the Lotus Sutra as the core of the teachings of Shakyamuni Buddha. However, it was when Soka Gakkai emerged as a lay Buddhist movement in postwar Japan that the practice of Nichiren Buddhism became widely accessible to ordinary people.