Onmyōji (陰陽師) is a manga series written and illustrated by Reiko Okano based on a novel series of the same name by Baku Yumemakura. It was serialized from 1993 to 2005 in the seinen magazine Comic Birz by Scola and the shōjo magazine Melody by Hakusensha. It follows the story of a master in onmyōdō, a traditional Japanese cosmology.