Inheriting such a historical document-compiling tradition, the compilation of "Nihonshoki" (Chronicles of Japan), the first official document about Japanese history, was completed during the first half of the 8th century when a unified nation based on Ritsuryo codes was established.
そうした修史の伝統を継承して、律令統一国家が成立した8世紀前半には、日本最初の正史である『日本書紀』が完成した。