The nembutsu — namu Amida Butsu, I take refuge in Amida Buddha — is the practice, and its accessibility is the entire point: it can be said by anyone, illiterate, dying, working, without instruction or ceremony. Hōnen taught it as the sufficient practice; Shinran taught that saying it even once in true entrusting is enough and that all subsequent recitation is gratitude rather than effort. Jōdō Shinshū became the largest Buddhist denomination in Japan on that teaching.