The title okimi and amenoshitashiroshimesu okimi (the title of the king of Wa) were established at least by the latter half of the fifth century, and it is thought that these titles were used in Japan until the 680s when the compilation of the Asuka Kiyomihara Code began.
5世紀後半までに大王・治天下大王（あめのしたしろしめすおおきみ）の称号が成立し、この称号が飛鳥浄御原令の編纂が始まった680年代まで日本国内において用いられたと考えられている。