The Ii clan was a prominent samurai family in Japan during the feudal era, particularly known for their influence in the Edo period. They were originally from Mikawa Province and gained power through military service and strategic marriages. The clan's most notable figure was Ii Naomasa, a loyal retainer of the Tokugawa shogunate. The Ii clan held significant territories, including the Takamatsu Domain in Shikoku. They were recognized for their contributions to the stability and governance of the region. The clan's legacy is remembered for its role in shaping the political landscape of early modern Japan.