The Chiba clan (千葉氏 Chiba-shi?) was a branch family of the Taira clan descended from Chiba no Suke (a.k.a Chiba Tsunetane), son of Taira no Tadatsune. The Chiba governed in Shimōsa Province, and the clan was based in present-day Chiba City. The clan additionally, for a period, the area that includes the Ise Grand Shrine. After the establishment of the Kamakura shogunate, the head of the Chiba clan became the hereditary shugo governor of Shimōsa Province.