 The town of Kisarazu merged with the villages of Takene, Kiyokawa, and Namioka to form the city of Kisarazu on November 3, 1942.The towns of Kimitsu and Futtsu gained city status on September 1, 1971.The town of Sodegaura gained city status on April 1, 1991, upon which Kimitsu District creased to exist.