Chiyoda(千代田区,Chiyoda-ku?) is one of the 23 special wards in central Tokyo, Japan. In English, it is called Chiyoda City. As of October 2007, the ward has an estimated population of 45,543 and a population density of 3,912 people per km², making it by far the least populated of the special wards. The total area is 11.64 km², of which the Imperial Palace, Hibiya Park, National Museum of Modern Art, and Yasukuni Shrine take up approximately 2.6 sq.km, or 22% of the total area.
Chiyoda consists of the Palace and a surrounding radius of about 1 kilometer. It inherited the name, literally meaning "field of a thousand generations," from Chiyoda Castle (the other name of Edo Castle). Many government institutions, such as the Diet, Prime Minister's residence, and Supreme Court, are located in Chiyoda, as are Tokyo landmarks such as Yasukuni Shrine, Tokyo Station, and the Budokan. Fifteen embassies are located in Chiyoda.
Tokyo(東京,Tōkyō?, "Eastern Capital") (Japanese: [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?).