Tokyo (東京, Tōkyō, "Eastern Capital") ([toːkʲoː], English /ˈtoʊki.oʊ/); officially Tokyo Metropolis (東京都, Tōkyō-to), is one of the 47 prefectures of Japan. Tokyo is the capital of Japan, the center of the Greater Tokyo Area, and the largest metropolitan area in the world. It is the seat of the Japanese government and the Imperial Palace, and the home of the Japanese Imperial Family. Tokyo is in the Kantō region on the southeastern side of the main island Honshu and includes the Izu Islands and Ogasawara Islands. Tokyo Metropolis was formed in 1943 from the merger of the former Tokyo Prefecture (東京府, Tōkyō-fu) and the city of Tokyo (東京市, Tōkyō-shi).
Tokyo has been described as one of the three "command centers" for the world economy, along with New York City and London. The city is considered an alpha+ world city, listed by the GaWC's 2008 inventory and ranked fourth among global cities by A.T. Kearney's 2012 Global Cities Index. In 2012 Tokyo was named the most expensive city for expatriates, according to the Mercer and Economist Intelligence Unit cost-of-living surveys, and in 2009 named the third Most Liveable City and the World’s Most Livable Megalopolis by the magazine Monocle. The Michelin Guide has awarded Tokyo by far the most Michelin stars of any city in the world. Tokyo hosted the 1964 Summer Olympics and is currently a Candidate City for the 2020 Summer Olympics.