is a major railway station in the Shinjuku and Shibuya wards in Tokyo, Japan. In Shinjuku, it is part of the Nishi-Shinjuku and Shinjuku districts. In Shibuya, it is located in the Yoyogi and Sendagaya districts. Serving as the main connecting hub for rail traffic between Tokyo's special wards and Western Tokyo on the inter-city rail, commuter rail, and subway lines, the station was used by an average of 3.59 million people per day in 2018, making it, by far, the world's busiest transport hub (and registered as such with Guinness World Records). The main JR station and the directly adjacent private railways have a total of 35 platforms, including an underground arcade, above-ground arcade and numerous hallways with another 17 platforms (53 total) that can be accessed through hallways to 5 directly connected stations without surfacing outside. The entire above/underground complex has well over 200 exits. Shinjuku is served by the following railway systems: Chūō Main Line (Limited Express) Chūō Line (Rapid) Chūō–Sōbu Line Saikyō Line Shōnan–Shinjuku Line Yamanote Line Keio Corporation: Keio Line Keio New Line Odakyu Electric Railway: Odakyu Odawara Line The station is centered around facilities servicing the East Japan Railway Company (JR East) lines. These consist of eight ground-level island platforms (16 tracks) on a north-south axis, connected by two overhead and two underground concourses. Most JR services here are urban and suburban mass transit lines, although many limited express services to Kōfu and Matsumoto on the Chūō Main Line and to Nikkō and Kinugawa Onsen via joint operations with the private Tōbu Railway also begin and end at this station, including Narita Express services to and from Narita International Airport. The JR section alone handles an average of 1.5 million passengers a day. File:JRE-Shinjuku-STA East-Gate.jpg|East gates in July 2021 File:JRE-Shinjuku-STA West-Gate.jpg|West gates in July 2021 File:JRE-Shinjuku-STA Connecting-passage.jpg|Internal concourse in July 2021 File:JRE-Shinjuku-STA Central-east-Gate.