 The first records related to the city of Chiba record the emigration of Taira Tsuneshige (1083?–1088), a powerful "bushi" warlord of the late Heian period, to Shimōsa Province, which historically occupied the north of Chiba Prefecture.Tsuneshige was appointed as "gunji" administrator of Sōma District, but was transferred to the same position in Chiba District two years later.Here he proclaimed himself , became a "kokushi" governor of the province, and used the area around present-day Chiba City as a power base to rule over Shimōsa Province, Kazusa Province, as well as establish himself as a military force in the Kantō region.