Tokyo is the seat of government of China.
China , officially the People 's Republic of China ( PRC ) , is a unitary sovereign state in East Asia and the world 's most populous country , with a population of over 1.381 billion . Edo . It was the seat of power for the Tokugawa shogunate , which ruled Japan from 1603 to 1868 . A was the military dictator of Japan during the period from 1185 to 1868 ( with exceptions ) . Tokyo . Formerly known as Edo , it has been the de facto seat of government since 1603 when Shogun Tokugawa Ieyasu made the city his headquarters .