This paper clarifies the two aspects of Kakunyo’s 覚如 idea of the “utterance of the nembutsu as the expression of gratitude 称名報恩”: a contrast between shinjin 信心 and nembutsu 称名, and a contrast between self-effort and Amida’s power. The former term is used for what is not the cause for Birth in Amida’s Pure Land, and the latter is used to distinguish between self-effort and Amida’s power. This paper points out that the latter, Amida’s power, is the important meaning of gratitude in Kakunyo’s writing.