Sanuki Domain  The original Sanuki Castle was built by the Satomi clan, rulers of most of the Bōsō Peninsula during the Sengoku period. Following the Battle of Odawara in 1590, the Kantō region by was assigned to Tokugawa Ieyasu by the warlord Toyotomi Hideyoshi, who also restricted the Satomi to Awa Province for their lukewarm support of his campaigns against the Later Hōjō clan. Tokugawa Ieyasu appointed Naitō Ienaga, one of his hereditary retainers, to be "daimyō" of the newly formed 20,000 "koku" Sanuki Domain. During the Siege of Fushimi in 1600 prior to the Battle of Sekigahara, Naito Ienaga was one of the last defenders of Fushimi Castle to fall to the forces of Ishida Mitsunari. He was succeeded by his son, Naito Masanaga, who was awarded an additional 10,000 "koku" for his efforts at the Siege of Osaka. He gained another 10,000 "koku" for his participation in the suppression of the Satomi clan at Tateyama Domain in Awa Province, and yet another 5,000 "koku" when Shōgun Tokugawa Hidetada visited on an extended falconry expedition, thus bringing his total revenues to 45,000 "koku". He was subsequently transferred to Iwakidaira Domain in Mutsu Province. His replacement, Matsudaira Tadashige, was an 8,000 "koku" "hatamoto" of Fukuya Domain in Musashi Province, who was elevated to the ranks of the "daimyō" with an additional 7,000 "koku" stipend. He was subsequently transferred to Tanaka Domain in Suruga Province and Sanuki Domain reverted to "tenryō" territory directly under the control of the Tokugawa shogunate. In January 1639, the domain was revived for Matsudaira Katsutaka, a former "jisha-bugyō," whose holdings had reached 15,000 "koku", qualifying for the status of "daimyō". However, the Matsudaira clan was dispossessed from Sanuki under the tenure of his son, Matsudaira Shigeharu, for mismanagement, and Sanuki Domain again lapsed to "tenryō" status. In May 1710, the domain was reestablished as a 16,000 "koku" holding for Abe Masatane, formerly "daimyō" of Kariya Domain in Mikawa Province.