Japanese clans, known as uji, were powerful family groups that played a significant role in Japan's history, especially during the Heian period (794-1185). These clans were often associated with specific regions and held considerable influence over local governance, military affairs, and cultural practices. Prominent clans, such as the Fujiwara and Taira, shaped the political landscape and engaged in alliances and conflicts to expand their power. The structure of these clans was typically hierarchical, with a leader at the top, often a daimyo or noble, followed by various ranks of family members and retainers. Clans maintained their status through land ownership, marriages, and military strength, which were crucial for survival in a feudal society. Over time, many clans evolved