Shinjuku Station is one of the busiest transit hubs in the world, served by a staggering array of lines from five different operators. The primary JR East lines include the Yamanote Line (the city loop), the Chuo Line (Rapid and Local), the Saikyo Line, and the Shonan-Shinjuku Line. For subway travel, the station is served by the Tokyo Metro Marunouchi Line and the Toei Subway Shinjuku and Oedo Lines. Additionally, private railways like the Odakyu Odawara Line (for Hakone) and the Keio Line/Keio New Line terminate here. While it is a massive hub for regional travel and the Narita Express, it notably does not have direct Shinkansen access; for high-speed rail, you must take a short 15-20 minute hop via the Chuo or Yamanote lines to either Tokyo Station or Shinagawa Station.