The term "dynastic" derives from the fact that the Nara period and the Heian period were collectively called Dynastic periods in the pre-War period while the Kamakura period and subsequent periods were collectively called Feudal periods.
王朝の語は、戦前期より、鎌倉時代以降を武家時代と称したのに対し奈良時代・平安時代を王朝時代と称したことに由来する。