Shinjuku is served by the following railway systems:
- JR East: ¦ Chuo Main Line (Limited Express) JC Chuo Line (Rapid) JB Chuo–Sobu Line. JA Saikyo Line. ...
- Keio Corporation: KO Keio Line. KO Keio New Line.
- Odakyu Electric Railway: OH Odakyu Odawara Line.
- Toei Subway: E Oedo Line. S Shinjuku Line.
- Tokyo Metro: M Marunouchi Line.