The took place between May and July 1868, when the Japanese capital of Edo (modern Tokyo), theretofore controlled by the Tokugawa Shogunate, fell to forces favorable to the restoration of Emperor Meiji during the Boshin War. Saigō Takamori, leading the victorious imperial forces north and east through Japan, had won the Battle of Kōshū-Katsunuma in the approaches to the capital. He was eventually able to surround Edo in May 1868. Katsu Kaishu, the Shogun's Army Minister, negotiated the surrender, which was unconditional.