Tokyo Monorail (東京モノレール, Tōkyō Monorēru^?), officially the Tokyo Monorail Haneda Airport Line (東京モノレール羽田空港線, Tōkyō Monorēru Haneda Kūkō sen^?), is a monorail system connecting Haneda Airport in Ōta, Tokyo, Japan, to Hamamatsuchō Station in Minato, Tokyo. The trains operate along an elevated line that follows the coast of Tokyo Bay. The trip from the airport to Hamamatsuchō costs ¥470 each way.

The line opened in 1964 to coincide with the 1964 Summer Olympics. Built by Hitachi Monorail, the first cars were made in Japan from the German ALWEG design (also used in the Seattle Center Monorail and the original Disneyland Monorail), and were replaced by newer models in 1969, 1977, 1982, and 1989.

Originally, the monorail only served Hamamatsuchō and the airport. The first station added in between was the Ōi Race Track in 1965, followed by Seibijō in 1967.

When the monorail began operation, the passenger terminal at Haneda Airport was located on the west side of the airfield, south of Seibijō, and this was the southern terminus of the monorail. Upon the opening of the new passenger terminal (now Terminal 1) in 1993, the monorail was extended to a new platform, and the former passenger terminal was razed to make room for an extension of Runway B. The now-unused monorail tunnel leading to the old station was leased from the Transport Ministry and therefore had to be restored to its original state prior to its handover. Although the rails were removed from the tunnel and its entrance walled off, the tunnel remains otherwise intact today below the extension of Runway B.

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 of 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^?).

The Tokyo Metropolitan government administers the 23 special wards of Tokyo (each governed as a city), which cover the area that was the city of Tokyo, as well as 39 municipalities in the western part of the prefecture and the two outlying island chains. The population of the special wards is over 8 million people, with the total population of the prefecture exceeding 13 million. The prefecture is part of the world's most populous metropolitan area with upwards of 35 million people and the world's largest urban agglomeration economy with a GDP of US$1.479 trillion at purchasing power parity in 2008, ahead of New York City metropolitan area, which ranks second on the list. The city hosts 47 of the Fortune Global 500 companies, the highest amount of any city.