Chūō Line (Rapid)
The is the name given to rapid services on the eastern section of the Chūō Main Line operated by the East Japan Railway Company (JR East) between and stations. The official map shows services travel as far as Otsuki. Services. Although the Chūō Line (Rapid) designation only refers to the section between Tokyo and Takao stations, many trains continue on past Takao to Ōtsuki, with some trains operating through services to other lines. These include both limited express and various special rapid services. For details, see the Chūō Main Line article. In addition, Chūō Line (Rapid) trains  do not stop at some stations between Ochanomizu and Nakano stations; for information on those services, see the Chūō-Sōbu Line article. The Chūō Line (Rapid) uses the two express tracks on the four-track section between Ochanomizu and Mitaka stations. Past Mitaka, trains use both tracks on the remaining double-track section. Since the express tracks do not have platforms at several stations in central Tokyo, even the slowest services of the Chūō Line (Rapid) skip such stations and are therefore called . In addition to the basic type of "Rapid", there are some variations of the service types with  fewer stops. Holiday Rapid (ホリデー快速). A variety of Holiday Rapid services running on the Chūō Rapid Line operate during the weekends and holidays to serve passengers. Former Service. Itsukaichi Line and Hachikō Line through services. With the exception of the Holiday Rapid Akigawa, through services to the Itsukaichi Line (to/from Musashi-Itsukaichi, via Haijima on the Ōme Line) and Hachikō Line (to/from as far as Komagawa, via Haijima on the Ōme Line) operated until 11 March 2022. History. Most of the route of the Chūō Line (Rapid) was built by the Kōbu Railway and later acquired by the  Japanese Government Railways in 1906. Operation of electric multiple unit (EMU) trains on the Chūō Main Line began in 1904. By 1930, the EMU service had reached Tokyo to the east and Asakawa (now Takao) to the west. In 1933, two tracks were added to the existing double-tracked section between Ochanomizu and Iidamachi stations (later closed) to complete the four-track line between Ochanomizu and Nakano. On these additional tracks, , which skipped all stations except Yotsuya and Shinjuku, were introduced the same year. The express service was renamed service in March 1961. Initially, the operation of express/rapid services  was limited to weekday peak periods only. Express service began on weekends on March 5, 1944; daytime non-peak operation began on November 9, 1959, but it was limited to weekdays only until April 28, 1966. All day rapid service trains are available since March 14, 2020, when early morning and late night rapid operations began. Manseibashi Station, located between Kanda and Ochanomizu, was closed in 1943. On the section east of Takao, only Nishi-Kokubunji Station (opened in 1973) and Nishi-Hachiōji Station (opened in 1939) were opened after the start of rapid services. Future developments. JR East plans  to introduce Green (first class) cars on Chūō Line (Rapid) and Ome Line services from fiscal 2021 or later. This will involve adding two bilevel Green cars to 10-car and 6-car E233 series EMU sets, forming 12-car and 8-car sets. Work will be involved in lengthening station platforms and depot facilities to handle the longer trains. In order to compensate the insufficient train sets for regular operations due to existing sets to be undergoing green car addition modifications, two 209-1000 series train sets originally used on the Jōban Line (Local) have been transferred to the  Chūō Line. These sets commenced service from 16 March 2019. High suicide rate. The Chūō Rapid Line is known for a high number of suicides, primarily due to the high speed at which some trains pass through stations on the line.