Iwaki Province (718)
This iteration of Iwaki Province lasted for a brief period of time in Nara period. Established in 718 with the division of Mutsu Province, it was composed of five district of Iwaki (石城), Shineha (標葉), Namekata (行方), Uta (宇太), Watari (曰理) and Kikuta (菊多). Only Kikuta district was given from Hitachi Province. Abolished and returned to Mutsu sometime between 722 and 724. Kikuta moved to Mutsu at that time.
- Iwaki Province (1868), brief reconstitution.