Emperor Jimmu is traditionally regarded as the first emperor of Japan, believed to have reigned around 660 BCE. According to Japanese mythology, he is said to be a descendant of the sun goddess Amaterasu and is credited with founding the Japanese imperial line. His story is recorded in ancient texts like the Nihon Shoki and Kojiki. Jimmu's legendary journey to establish his rule involved overcoming various challenges and uniting different tribes. He is often depicted as a heroic figure who symbolizes the beginning of the Japanese nation. His legacy continues to influence Japanese culture and identity today.