The Tokugawa shogunate (Edo shogunate) came into being when Ieyasu TOKUGAWA settle the government in Edo, his own territory, after taking office as shogun (a barbarian-quelling generalissimo).
徳川家康は征夷大将軍に就くと自領である江戸の地に幕府を開き、ここに徳川幕府（江戸幕府）が誕生する。