Sunpu Castle
After the defeat of the Takeda clan in 1582 by the forces of Oda Nobunaga and Tokugawa Ieyasu, the castle went to Tokugawa Ieyasu until 1590, when he was transferred to the Kantō region by Toyotomi Hideyoshi. Numazu was awarded to Nakamura Kazuuji, a retainer of Hideyoshi, who also held Sunpu Castle. Following the Battle of Sekigahara, Tokugawa Ieyasu recovered his ancestral possessions in Suruga, and gave Numazu to his veteran general, Ōkubo Tadasuke in 1601. However, Ōkubo died without heir in 1613, and his domain was abolished, and Sanmaibashi Castle fell into ruin.