In the 6th century when the Yamato sovereignty (the ancient Japan sovereignty) was going to form a unified nation, Teiki, which recorded the family tree of the Wa royal family, and Kyuji, in which mythology of Wa was described, were compiled.
ヤマト王権が統一国家を形成しようとしていた6世紀には、倭王家の系譜を記す『帝紀』・倭国の神話を記す『旧辞』が、編纂された。