Following the Battle of Odawara in 1590, Toyotomi Hideyoshi transferred Tokugawa Ieyasu to the Kantō region, and gave a portion of his former territories in eastern Mikawa to Ikeda Terumasa. Terumasa developed the castle town around Yoshida Castle and embarked on a massive and ambitious expansion plan for the castle itself. However, following the Battle of Sekigahara, he was reassigned to Himeji Castle, and left Yoshida even before a central donjon had been completed.