Nembutsu

Nianfo (念佛. Chinese pinyin nianfo; Japanese: 念仏 nembutsu; Korean: 염불 yeombul; Vietnamese: niệm Phật), literally "mindfulness of the Buddha" is a term commonly seen in the Pure Land school of Mahayāna Buddhism. It refers to praise offered to Amitabha Buddha as a devotional act. The original Sanskrit phrase was Namo Amitabha Buddha, which can mean either "I entrust in the Buddha of Immeasurable Light and Eternal Life" or simply "Hail to the Buddha of Immeasurable Light and Eternal Life".
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In Japanese, the term by which devotees call on Amitabha Buddha. They usually say "Praise to the Buddha Amitabha," i.e., "Namu Amida Butsa," which can be shortened to "Nembutsu."