徳川家茂
Following the murder of Ii Naosuke in 1860 and the attempted assassination of his successor, Andō Nobumasa, the idea of "kōbu gattai" faded into the background. It was strongly opposed by proponents of the "Sonnō jōi" movement, who sought to overthrow the shogunate and restore political power to the Emperor, as well as by major "daimyō" such as Shimazu Hisamitsu of Satsuma Domain and Matsudaira Shungaku of Fukui Domain who sought a compromise proposal whereby the Tokugawa clan would retain some measure of hegemony under a European-style parliamentary system. Despite this opposition, the marriage between Shogun Tokugawa Iemochi and Princess Kazunomiya took place in 1862. Tokugawa Iemochi died in 1866, by which time events had increasingly rendered the "kōbu gattai" concept obsolete. In 1868, the Boshin War and the Meiji restoration rendered "kōbu gattai" irrelevant.