中央線快速
The "Shinkansen Relay" name was reintroduced between 1998 and 2001 for morning and evening limited-stop services between and via the Musashino Line to provide connections to northbound shinkansen services for passengers originating from the Chūō Line (Rapid) area. Services were introduced in 1997 as the "Komachi Relay" before becoming the "Shinkansen Relay", and were formed of 6-car 165 and 169 series EMU formations. The services were renamed "Musashino" from 2001.