Premise: 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 . It officially became the capital after Emperor Meiji moved his seat to the city from the old capital of Kyoto in 1868 ; at that time Edo was renamed Tokyo .
Hypothesis: Tokyo was formerly known as Edo.
Label: ENTAILMENT