Bureau of Onmyō; government office in charge of astronomical observations, divination and calendar making (under the ritsuryo system)
Onmyōdō; way of Yin and Yang; occult divination system based on the Taoist theory of the five elements
the cosmic dual forces (yin and yang) and the five elements (metal, wood, water, fire and earth) in Chinese cosmology
diviner (esp. of the Yin and Yang system); sorcerer; exorcist; medium