Kiyosu Castle
After Nobuhide died in 1551, his son Oda Nobunaga was initially unable to assume control of the entire clan. Nobuhide’s younger brother Oda Nobutomo, with the support of Shiba Yoshimune, took over Kiyosu Castle in 1553. After Yoshimune revealed to Nobunaga an assassination plot in 1554, Nobutomo had Yoshimune put to death. The next year, Nobunaga retook Kiyosu Castle and captured his uncle, forcing him to commit suicide not long after. Nobunaga also had his younger brother, Oda Nobuyuki assassinated at Kiyosu Castle’s donjon in 1557. Nobunaga sealed his alliance with Tokugawa Ieyasu during treaty negotiations held at Kiyosu Castle in 1562. Nobunaga relocated from Kiyosu to Iwakura Castle in 1563.