Shinjuku (新宿区) is one of the 23 special wards of Tokyo, Japan. It is a major commercial and administrative centre, housing the busiest train station in the world (Shinjuku Station) and the Tokyo Metropolitan Government Building, the administration centre for the government of Tokyo.

As of 2008, the ward has an estimated population of 312,418 and a density of 17,140 persons per km². The total area is 18.23 km².

As of October 1, 2005, 29,353 non-Japanese with 107 different nationalities were registered in Shinjuku.

Surrounding Shinjuku are six other wards: Chiyoda to the east; Bunkyo and Toshima to the north; Nakano to the west, and Shibuya and Minato to the south. In addition, Nerima is only a hundred meters away. The highest point in Shinjuku is Hakoneyama (箱根山) in Toyama Park at 44.6 m. The lowest point is 4.2 m near Iidabashi.

Although the area immediately surrounding Shinjuku Station is home to hotels, department stores, specialist electronic and camera shops, cinemas, restaurants, and bars, the rest of the city is a mix of residential with commercial areas concentrated around railway stations.

Many companies have their headquarters or Tokyo offices in Shinjuku.

• NTT East has its headquarters in the Shinjuku.
• Seiko Epson’s Tokyo office is in the Shinjuku NS Building in Nishi-Shinjuku.
• Atlus has its headquarters in Kagurazaka.
• Nissin Foods’s Tokyo offices are in Shinjuku.
• Airtransse, a regional airline, has its headquarters near Shinjuku Gyoen.
• Shinchosha has its headquarters in Yaraichō, Shinjuku
• Futabasha has its headquarters in Higashigokenchō, Shinjuku
• Yoshinoya has its headquarters in the Da Vinci Shinjuku Building (ダヴィンチ新宿ビル) in Shinjuku.
• H.I.S.’s headquarters is in the Shinjuku Oak Tower in Nishi-Shinjuku
• Jorudan has its headquarters in Shinjuku.

In March 1990 the headquarters of Bandai Visual moved to the Shinjuku neighborhood in Shinjuku Ward. In August 1991 the headquarters moved to Taitō, Tokyo. Previously the headquarters of MOS Burger were in Shinjuku.

Rail

• JR East
  • Yamanote Line: Takadanobaba, Shin-Ōkubo, Shinjuku
  • Chūō Line (Rapid), Chūō-Sōbu Line: Yotsuya, Shinanomachi, Shinjuku, Ōkubo
  • Saikyō Line, Shōnan-Shinjuku Line: Shinjuku
• Tokyo Metro
  • Marunouchi Line: Yotsuya, Yotsuya-sanchōme, Shinjuku-gyoenmae, Shinjuku-sanchōme, Shinjuku, Nishi-Shinjuku
  • Yūrakuchō Line: Ichigaya, Iidabashi
  • Tōzai Line: Kagurazaka, Waseda, Takadanobaba, Ochiai
  • Fukutoshin Line: Nishi-Waseda, Higashi-Shinjuku, Shinjuku-sanchōme
  • Namboku Line: Iidabashi, Ichigaya, Yotsuya
• Tokyo Metropolitan Bureau of Transportation
  • Toei Shinjuku Line: Akebonobashi, Shinjuku-sanchōme, Shinjuku
  • Toei Ōedo Line: Ochiai-Minaminagasaki, Nakai, Nishi-Shinjuku-gochōme, Tochō-mae, Kokuritsu-Kyōgijō, Ushigome-Kagurazaka, Ushigome-Yanagichō, Wakamatsu-Kawada, Higashi-Shinjuku, Shinjuku-Nishiguchi
  • Toden Arakawa Line: Omokagebashi, Waseda
• Odakyū Electric Railway Odawara Line: Shinjuku
• Keio Corporation Keiō Line, Keiō New Line: Shinjuku
• Seibu Railway Seibu Shinjuku Line: Seibu-Shinjuku, Takadanobaba, Shimo-Ochiai, Nakai

Roads

• Shuto Expressway:
  • No.4 Shinjuku Route (Miyakezaka JCT – Takaido)
  • No.5 Ikebukuro Route (Takebashi JCT – Bijogi JCT)
• National highways:
  • National Route 20 (Shinjuku-dōri, Kōshū-kaidō)
• Other major routes:
  • Tokyo Metropolitan Route 8 (Mejiro-dōri, Shin-Mejiro-dōri)
  • Tokyo Metropolitan Route 302 (Yasukuni-dōri, Ōme-kaidō)
  • Tokyo Metropolitan Route 305 (Meiji-dōri)

Colleges and universities

• Chuo University graduate school
• Gakushuin Women’s College
• Japan Electronics College
• Keio University Medical College
• Kogakuin University
• Lakeland College Japan
• Mejiro University
• Tokyo Fuji University
• Tokyo Medical University
• Tokyo University of Science
• Tokyo Women’s Medical University
• Waseda University

Schools

• Koishikawa Technical High School
• Ichigaya Commercial High School
• Shinjuku High School
• Shinjuku Yamabuki High School
• Toyama High School

Shinjuku operates several public libraries, including the Central Library (with the Children’s Library), the Yotsuya Library, the Tsurumaki Library, Tsunohazu Library, the Nishi-Ochiai Library, the Toyama Library, the Kita-Shinjuku Library, the Okubo Library, and the Nakamachi Library. In addition there is a branch library, Branch Library of Central Library in the City Office, located in the city office.

Hospitals

• Keio University Hospital
• International Medical Center of Japan
• Social Insurance Chūō General Hospital
• Tokyo Medical University Hospital
• Tokyo Women’s Medical University Hospital
• Tokyo Metropolitan Health and Medical Treatment Corporation Ohkubo Hospital

Museums

• National Printing Bureau Banknote and Postage Stamp Museum
• National Museum of Nature and Science, Shinjuku Branch
• Shinjuku Historical Museum
• Tokyo Fire Department Museum

Halls

• Tokyo Opera City
• Shinjuku Bunka Center
• WelCity Tokyo
• Meiji Yasuda Life Hall
• Shinjuku Koma Theater

Sightseeing

• Shinjuku Gyoen
• Shinjuku Central Park (Shinjuku Chūō Kōen)
• Tokyo Metropolitan Government Building (designed by renowned architect Kenzo Tange)
• Park Hyatt Tokyo and Park Tower (featured in the film Lost in Translation)
• Waseda University’s Ōkuma Auditorium
• Waseda El Dorado building
• Meiji Shrine Outer Gardens and the Meiji Memorial Picture Gallery