Ark Hills Sengokuyama Mori Tower

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Ark Hills Sengokuyama Mori Tower
Ark Hills Sengokuyama Mori Tower
General information
TypeOffices, shops, residences
Architectural style Modern
Location Roppongi, Tokyo, Japan
Coordinates 35°39′49″N139°44′30″E / 35.6635993°N 139.7417854°E / 35.6635993; 139.7417854 Coordinates: 35°39′49″N139°44′30″E / 35.6635993°N 139.7417854°E / 35.6635993; 139.7417854
Construction startedOctober 2009
CompletedAugust 2012
Architectural206.7 m (678 ft)
Tip217.1 m (712 ft)
Top floor198.4 m (651 ft)
Observatory198.4 m (651 ft)
Technical details
Floor count51 (47 above ground, 4 underground)
Floor area143,462 m2 (1,544,210 sq ft)
Design and construction
ArchitectIrie Miyake Architects and Engineers
Pelli Clarke Pelli Architects
Developer Mori Building Company
Main contractor Obayashi Corporation
[1] [2] [3] [4] [5]

The Ark Hills Sengokuyama Mori Tower (アークヒルズ仙石山森タワー) is a 206.7 m (678 ft) mixed-use skyscraper in Roppongi, Minato ward, Tokyo. The building was designed by Irie Miyake Architects and Engineers and Pelli Clarke Pelli Architects, while the construction process was managed by Obayashi Corporation. In addition, it was developed by Mori Building Company. Construction of the tower started in 2009 and completed in 2012. It has 47 storeys. [1] [6] [7]


The building is situated on 2 hectares (4.9 acres) land area near Ark Hills and close to the Kamiyachō Station on the Tokyo Metro Hibiya Line, and Roppongi-itchōme Station on the Tokyo Metro Namboku Line. [4] [8] It is also surrounded by gardens that were designed to replicate the natural wildlife in Tokyo. [9]


Seismic design

The building was designed to withstand earthquakes and strong winds by using two different types of mass dampers. The first damper type is the viscous vibration damping walls (the "sticky wall") that was designed to sustain small- and medium-size earthquakes, [lower-alpha 1] [10] [12] while the second damper type is the brake damper that was designed to sustain major earthquakes. [lower-alpha 2] [10]

Facade and primary uses

The primary functions of the building are distinguished by its facade. The retail and commercial uses of the building, which are located on floors 1-2, are represented by the glass and stone facade with the squared-shape building corners; the apartments, which are located on floors 3-24, are distinguished by its balconies with the rounded-shape building corners; while the offices, which are located on floors 25-47, are covered by the glass with the building corners are subtly stepped back, forming the cone-like shape on the upper parts of the building. [14]

See also

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  1. The viscous vibration damping walls are damping devices in which high-viscosity fluid (highly sticky substance) is injected into the box-shaped steel plates that located along the core of the building so that they would create a resistance force by absorbing the floor shake gradually when the structure started to sway. [10] It was previously implemented on Roppongi Hills. [11]
  2. The brake (seismic friction) damper is a damping device that uses frictional energy of brake pads to absorb vibrations. [10] [13]


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  3. "Ark Hills Sengokuyama Mori Tower". SkyscraperPage . Retrieved 10 September 2020.
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  5. "ARK Hills Sengokuyama Mori Tower". Obayashi Corporation . Retrieved 10 September 2020.
  6. Mori Building (森ビル) (7 August 2012). "アークヒルズ仙石山森タワー竣工 外資中心にテナント55%決定". Jūtaku Shinpō (住宅新報) web (in Japanese). Retrieved 10 September 2020.
  7. "森ビル、六本木・虎ノ門地区の「アークヒルズ 仙石山森タワー」が竣工". Zaikei Shimbun (財経新聞) (in Japanese). 7 August 2012. Retrieved 10 September 2020.
  8. "ARK Hills Sengokuyama Mori Tower: Concept and History". Mori Building Company . Retrieved 10 September 2020.
  9. Wetherille, Kelly (1 June 2018). "Bird watching in the heart of Tokyo". Japan Today . Retrieved 10 September 2020.
  10. 1 2 "Ark Hills Sengokuyama Mori Tower, Tokyo". Council on Tall Buildings and Urban Habitat. Archived from the original on 23 June 2016. Retrieved 10 September 2020.
  11. "Roppongi Hills: Introduction of New Technology". Mori Building Company . Retrieved 10 September 2020.
  12. Alexander, Lucy (1 June 2013). "The Tokyo skyscrapers that can withstand a major earthquake". Financial Times . Retrieved 10 September 2020.
  13. "What are Seismic Friction Dampers?". Quaketek. Retrieved 10 September 2020.
  14. Crosbie 2013, pp. 244–245.