onmyōji

Onmyōji (Japanese: 陰陽師; literally: yin-and-yang master) was one of the official positions belonging to the Bureau of Onmyō of the Ministry of the Center under the ritsuryō system in ancient Japan, and was assigned as a technical officer in charge of divination and geomorphology based on the theory of the yin-and-yang five phases. In the Middle Ages and early modern period, the term was used to refer to those who performed prayers and divination in the private sector, and some of them were regarded as a kind of clergy.