Premise: , also romanized as Jedo , Yedo or Yeddo , is the former name of Tokyo . It was the seat of power for the Tokugawa shogunate , which ruled Japan from 1603 to 1868 . The are 23 municipalities that together make up the core and the most populous part of Tokyo , Japan . Tokyo . Tokyo is in the Kantō region on the southeastern side of the main island Honshu and includes the Izu Islands and Ogasawara Islands . Formerly known as Edo , it has been the de facto seat of government since 1603 when Shogun Tokugawa Ieyasu made the city his headquarters .
Hypothesis: Japan contains Tokyo.
Label: ENTAILMENT