Ieyasu TOKUGAWA, victorious in the Battle of Sekigahara, decided to build a castle at Omiya Oshikoji to be used as his residence during his stay in the capital; he began removing townhouses in May of 1600 and split the cost of construction and labor with the daimyo of the western provinces in December.
関ヶ原の戦いで勝利した徳川家康は上洛時の宿所として大宮押小路に築城を決め、慶長6年（1601年）5月から町屋の立ち退きを開始、12月に西国諸大名に造営費用および労務の割り当てを行った。