It is hard to speak briefly about Genshin's Idea about the Buddha-nature. Koe Yagi and Rengetu Fukuhara argued his doctrine as the same as Shinjinbussho 信心仏性. This term is used to express Shinran's doctrine of the Buddha-nature, and many scholars pointed out the influence from Genshin on this subject. But I am not in a position to agree with Yagi and Fukuhara's opinion.
Genshin thought that Icchantika have insufficient faith but do have the Buddha-nature. If piety is the same as the Buddha-nature, there is a contradiction in his doctrine. He regarded piety as a most important key for training. Genshin thought that through training, beings will see the Buddha-nature and become spiritually enlightened.
