Nembutsu, “mindfulness of the Buddha”, originally meant meditation on a buddha and came to mean the recitation of Amitābha’s name. Hōnen taught that it alone suffices for rebirth in the Pure Land; Shinran that it is the expression of a faith given by Amida, not a practice that earns anything.
Nembutsu
The recitation of Amida Buddha’s name, “Namu Amida Butsu”, the central practice of Pure Land Buddhism.
Also: Nianfo