Kojiki
The Nakatsumaki begins with the story of Jimmu, the first Emperor, and how he conquered Japan. The volume ends with the 15th emperor, Ōjin. Not much is written about the reigns of the second through the ninth emperors; only their names and the names of their various descendants are mentioned, as well as a few other details. There is no mention of their achievements. Many of the stories in this volume are mythological, and there is no evidence to suggest that they are historically accurate. Recent studies support the opinion that these emperors were invented to push Jimmu's reign further back to the year 660 BC.