Nihon Sandai Jitsuroku is a historical text that chronicles the events of Japan during the Heian and Kamakura periods. Compiled in the 13th century, it serves as a valuable source of information about the political, social, and cultural developments of the time. The work is divided into three main sections, each focusing on different aspects of Japanese history. The text is notable for its detailed accounts of the lives of prominent figures, including emperors and shoguns. It also highlights significant events, such as battles and diplomatic relations, providing insights into the complexities of Japanese governance and society during its formative years.