Chūō Line (Rapid)
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.