Onmyou no Miyako

, is a Japanese light novel series written by Soichiro Watase, with illustrations by Tajima Shou (Vol. 1), Wataru Saino (Vol 2 - 5). The series began publication on February 10, 2001 by ASCII Media Works under their Dengeki Bunko publishing imprint.

The series won the Gold Prize in the 7th Dengeki Novel Prize.

Synopsis
Time is peaceful. Despite being born into a prestigious Onmyodo, there was a young man who abandoned his family business, Onmyodo, and chose to write. The name of the young man is Yoshishige no Yasushi. At the request of Onmyoji Abe no Seimei, Yasutane begins to investigate the identity of the foreign lawyer who recently appeared in the capital. However, that was just the trigger to lead the sword to the incident where tremendous resentment and curse swirled ...! The darkness of the Heian period when Chimimōryō was moving. Now, the devil dripping from the darkness begins to make the world go crazy ...