Shinjuku is one of the 23 wards of Tokyo, but the name commonly refers just to the large entertainment, business and shopping area around Shinjuku station. Handling more than two million passengers each day, Shinjuku station is Japan’s busiest railway station, served by six railway companies and about a dozen railway and subway lines, including the JR Yamanote line.
West of the station (west exit) is Shinjuku’s skyscraper district, home to many of Tokyo’s tallest buildings (including the Metropolitan Government Office with observation decks open to the public for free).
Northeast of the station (east exit) Kabukicho is located, which is Japan’s largest and wildest red light district.