The Kofun Period in Japan lasted from around 250 to 538 AD and is characterized by the construction of large burial mounds called kofun. These mounds were built for the elite and often contained grave goods, such as pottery, weapons, and jewelry, reflecting the social hierarchy of the time. During this period, Japan saw the emergence of powerful clans and the establishment of a more centralized society. The Yamato clan became prominent, laying the groundwork for the future imperial family. The Kofun Period also marked the introduction of new technologies and cultural influences from the Asian continent.