Sunpu Castle
In 1585, Ieyasu constructed a new Sunpu Castle on the approximate site of the former fortified Imagawa residence. He took up residence at the castle in 1586, along with his favored consort, Lady Saigō, and their two sons, Hidetada and Tadayoshi. Lady Saigo died at Sunpu Castle in 1589. After the defeat of the later Hōjō clan at the Battle of Odawara by Toyotomi Hideyoshi, Ieyasu was forced to change his domains in the Tōkai region with the provinces of the Kantō region, and turned Sunpu Castle over to Toyotomi retainer Nakamura Kazuichi in 1590.