Yamazaki Ansai was a Japanese philosopher and scholar. He began his career as a Buddhist monk, but eventually came to follow the teachings of Neo-Confucian Zhu Xi. He combined Neo-Confucian ideas with Shinto to create Suika Shinto.

Neo-Confucianism is a moral, ethical, and metaphysical Chinese philosophy influenced by Confucianism, which originated with Han Yu (768–824) and Li Ao (772–841) in the Tang dynasty, and became prominent during the Song and Ming dynasties under the formulations of Zhu Xi (1130–1200). After the Mongol conquest of China in the thirteenth century, Chinese scholars and officials restored and preserved neo-Confucianism as a way to safeguard the cultural heritage of China.