Echizen Matsudaira was a prominent Japanese samurai clan during the Edo period. They were based in the Echizen Province, which is now part of modern-day Fukui Prefecture. The clan was known for its loyalty to the Tokugawa shogunate and played a significant role in the political landscape of feudal Japan. The clan's most notable leader was Matsudaira Tadaaki, who served as a daimyo. The Echizen Matsudaira family produced several influential figures and contributed to the cultural and political development of the region. Their legacy is still recognized in Japan today, particularly in historical studies of the samurai era.