Historically, after much struggle, Tokugawa Ieyasu did become the seii taishogun, the 「great general who subdues the barbarians」 and the ruler of Japan with the emperor as a figurehead.
Tokugawa shogunate: (1603-1867) in Japanese history, period of the military government established by Tokugawa Ieyasu with his assumption of the title of shogun in 1603.