woodprint showing Sanada Yukimura (真田幸村) with his arquebusiers at the
Osaka Castle(大阪城). The
Siege of Osaka Castle was a series of battles undertaken by the Tokugawa shogunate against the Toyotomi clan, and ending in that clan's destruction. Divided into two stages (Winter Campaign and Summer Campaign), lasting from 1614 to 1615, the siege put an end to the last major armed opposition to the shogunate's establishment. The end of the conflict is sometimes referred to as the Genna Armistice (Genna Embu), because the era name was changed from
Keichō to
Genna immediately following the siege.
Winter Siege of Osaka Castle The winter campaign began on November 19, 1614; Osaka Castle siege commenced on December 4, 1614, and lasted until January 22, 1615, when a truce was reached. On November 19, Tokugawa forces (approx. 3,000 men) attacked a fort across the Kizu River, destroying it. A week later, Tokugawa forces attacked the village of Imafuku with 1,500 men against a defending force of 600. With the aid of a squad of
arquebusiers, the Tokugawa claimed victory once again. Several more small forts and villages were attacked before the siege on Osaka Castle itself began on December 4, 1614. Yukimura built a
small fortress called
Sanada-maru in the southwest corner of Osaka Castle. The Sanada-maru was an earthwork
barbican defended by 7,000 men under Yukimura's command. From there, he defeated the Tokugawa forces (approx. 30,000 men) with groups of 6,000 arquebusiers. The Shōgun's forces were repeatedly repelled, and the Sanada troops launched a number of attacks against the siege lines, breaking through three times. Ieyasu then resorted to
artillery, which included 17 imported European cannons and domestic wrought iron cannons, as well as
sappers employed to dig under the walls of the fortress. The fortress was impregnable; the Tokugawa suffered many losses. Ieyasu gave up trying to destroy the castle during this battle, and sued for peace with Toyotomi Hideyori. He proposed a condition for the reconciliation, i.e. to destroy the outer moat of the castle. When his envoy entered the castle grounds, they destroyed not only the outer moat but the inner moat as well.
Summer Siege of Osaka Castle and Death On June 3, 1615 (6th day of 5th month of 20 year of Keicho era), at the
Battle of Dōmyōji, Sanada Yukimura was in command of the Osaka Army on the right wing and engaged in a battle with Date Masamune forces in the area of Emperor Ōjin's Tomb and Konda Hachiman Shrine. This fight took place at around 12:00 and by 5:00 PM Sanada Yukimura made the decision to retreat towards Osaka Castle. On June 3, 1615 (7th day of 5th month of 20 year of Keicho era), at the
Battle of Tennōji after hurrying back to Osaka castle, Yukimura found the massive Tokugawa force of nearly 150,000 moving into positions in order to make their final assault on the castle. As the Tokugawa units were still moving into formation, the Toyotomi forces launched a last ditch offensive with their approximate 54,000 to 60,000 troops that hoped to take the still loose Tokugawa formations off-guard. As the vanguard of the Tokugawa left flank under Matsudaira Tadanao marched to their positions, Yukimura's troops charged down from Chausuyama (茶臼山) and fought with desperate abandon together with Mori Katsunaga's contingent. As Matsudaira's line began to crumble, Ieyasu rushed his personal body of troops up to support Matsudaira and Yukimura saw his chance to smash through the center. If he could keep the center of the Tokugawa forces tied up long enough for Hideyori to sally out of the castle and lead a general charge on the exposed Tokugawa flank, the Toyotomi forces might have a chance at victory—or so he hoped. Thus, at this moment, Yukimura dispatched his son, Sanada Daisuke back to the castle to urge Hideyori to seize the moment and sally forward. But Hideyori was too late. As the fighting raged around him, the exhausted Yukimura collapsed on a camp stool. A recent theory regarding the death of Yukimura posits that Yukimura was killed after a bout of single combat with Munetsugu by spear. At first Munetsugu did not recognize Yukimura and cut off his head and brought it back to the Tokugawa army camp. Yukimura's head was only recognized when an acquitaince of the Sanada clan visited the camp and recognized that it was Yukimura. == Family ==