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Early morning commuters at Shinjuku Station wait to board a Chuo Line train into Tokyo. JR (Japan Railways) has 16 tracks at Shinjuku Station and there are 38 tracks if you include the subway and metro lines along with the private railway companies Odakyu and Keio. Shinjuku train station is the busiest in the world with approximately 3.3 million people passing through the station everyday. .