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Roppongi Hills Mori Tower
Roppongi Hills Mori Tower from Tokyo Tower Day.jpg
General information
Location 6-10-1 Roppongi, Minato
Tokyo, Japan
Status Complete
Groundbreaking March 2000
Constructed 2000–2003
Opening April 25, 2003
Roof 238 meters (781 ft)
Technical details
Floor count 54 above ground
6 below ground
Floor area 380,105 m² (4,091,416 ft²)
Elevators 67
Companies involved
Architect(s) Kohn Pedersen Fox,The Jerde Partnership
Structural engineer Arup
Contractor Mori Building Company

Roppongi Hills Mori Tower (六本木ヒルズ森タワー Roppongi Hiruzu Mori Tawa ?) is a 54-story mixed-use skyscraper located in Roppongi, Minato, Tokyo. Completed in 2003 and named for builder Minoru Mori, the tower is the centerpiece of the Roppongi Hills urban development. It is currently the fifth-tallest building in Tokyo at 238 meters (781 ft). The building is primarily used for office space, but it also includes retail stores, restaurants and other tourist attractions. The Mori Art Museum is located on the 53rd floor and visitors can view the city from observation decks on the 52nd and 54th floors.

The tower has been at the center of several scandals. One of the building's tenants, livedoor, was raided by police. In 2004, a six-year-old boy was killed in one of the building's revolving doors. After a police investigation, three men were convicted of professional negligence that resulted in the boy's death. Later, an elevator fire in the building prompted nation-wide elevator inspections.



Mori Tower is a mixed-use facility that is used for retail and office space. The tower's first six floors house retail stores and restaurants. Floors 7–48 serve as office space and house corporate tenants such as Goldman Sachs and The Pokémon Company's headquarters.[1][2] Since the opening of Tokyo Midtown's Midtown Tower in 2007, however, former Mori Tower tenants such as Konami and Yahoo! Japan have since relocated to the new tower. Japanese internet service provider livedoor has also since vacated Mori Tower since the company's headquarters were searched in January 2006 resulting in the arrests of two company executives.[3]

The Mori Arts Center is located on floors 49–54. This center includes various tourist attractions spread over the tower's top six floors. Two members-only facilities—a library and a private club—are located on floors 49 and 51, respectively. Visitors are provided with views of the city at Tokyo City View on the 52nd floor and an open-air roof deck on the 54th floor.


Mori Art Museum

Opening in October 2003, the Mori Art Museum is the centerpiece of the Mori Arts Center. Its interior was designed by Gluckman Mayner Architects, and it originally occupied the entire 53rd floor as well as a portion of the 52nd floor. The museum's galleries on the 52nd floor have since been removed, however. British-born David Elliott served as the museum's director until he resigned in late 2006, and Fumio Nanjo assumed the position.[4] The museum is one of the only venues in Tokyo with a percentage of foreign visitors comparable to the Tokyo National Museum, but it attracts fewer visitors in total.[5]


2004 fatality

A child was killed when his head was crushed by this revolving door in 2004.

While on a tour of Mori Tower on the morning of March 26, 2004, six-year-old Ryo Mizokawa was killed in a revolving door at the building's second-floor main entrance. Mizokawa's head was crushed between the door rotating from his left and the outer frame; he died two hours after reaching the hospital.[6] The door's motion safety sensor was originally set to detect anything standing 80 centimeters (31.5 in) tall. This setting was changed to 135 centimeters (53.1 in), however, after the door began stopping unnecessarily when detecting a newly installed, nearby safety barrier. After the incident, it was revealed that 32 people had previously sustained injuries caused by revolving doors at Roppongi Hills since the complex opened less than a year earlier.[7] In an out-of-court settlement, the Mizokawa family received an undisclosed compensation payment from the building's operator, Mori Building Company.[8]

In March 2005, prosecutors indicted three people on charges of professional negligence resulting in death: senior Mori Building Co executives Yuzo Tada and Yukihiro Koyama and an executive from the revolving door's manufacturer, Sanwa Tajima Corporation, Hisanobu Kubo. Prosecutors argued that the Mori Building officials did not implement safety measures proposed after previous incidents because they would detract from the tower's entrance appearance.[9] All three pleaded guilty to the charges, and in September they received three-year suspended prison sentences of 10 months, 10 months and 14 months, respectively.[10]

2007 fire

On April 4, 2007, an elevator system in Mori Tower produced a fire that destroyed part of the tower's lift-motor room and forced hundreds of people to evacuate the building.[11] According to the elevator's manufacturer, Otis Elevator Company, a frayed cable scraping surrounding lift system components produced enough sparks to ignite a fire. After the fire, it was discovered that Otis was aware of rusted and frayed cables in the tower's elevator systems since January 2005.[12] The incident spawned nation-wide inspections of Japanese elevators by both Nippon Otis and the Land, Infrastructure and Transport Ministry. The ministry inspection of approximately 260,000 elevators turned up problems in 813 elevators.[13]

See also


  1. ^ Binder, Georges (2006). 101 of the World's Tallest Buildings. Images Publishing Group. ISBN 1-8647-0173-0.  
  2. ^ "会社概要". The Pokémon Company. Retrieved October 5, 2009.  
  3. ^ Nakamura, Akemi (March 27, 2007). "Midtown -- Roppongi just got loftier". The Japan Times. Retrieved September 5, 2009.  
  4. ^ Badtke-Berkow, Joseph (October 5, 2006). "Departing director created a new platform for contemporary art in Tokyo". The Japan Times. Retrieved September 5, 2009.  
  5. ^ Corkill, Edan (May 28, 2008). "Permanent collection not pulling crowds". The Japan Times. Retrieved September 5, 2009.  
  6. ^ "Boy crushed in Roppongi Hills' doors". The Japan Times. March 27, 2004. Retrieved September 4, 2009.  
  7. ^ "Mori Building raided over boy's death". The Japan Times. March 31, 2004. Retrieved September 4, 2009.  
  8. ^ "Payout made for revolving door death". The Japan Times. October 5, 2004. Retrieved September 4, 2009.  
  9. ^ "Trio plead guilty over revolving-door death at Roppongi Hills". The Japan Times. June 25, 2005. Retrieved September 4, 2009.  
  10. ^ Ito, Masami (October 1, 2005). "Execs avoid prison over Roppongi Hills fatality". The Japan Times. Retrieved September 4, 2009.  
  11. ^ "Mori fire sparks Otis elevator checks". The Japan Times. April 28, 2007. Retrieved September 4, 2009.  
  12. ^ "Nippon Otis aware of rusted elevator cables at Roppongi Hills for two years". The Japan Times. May 3, 2007. Retrieved September 4, 2009.  
  13. ^ "Checks uncover problems in 813 elevators, so far". The Japan Times. September 1, 2007. Retrieved September 4, 2009.  

External links

Coordinates: 35°39′38″N 139°43′45″E / 35.66056°N 139.72917°E / 35.66056; 139.72917


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