Ark Hills Sengokuyama Mori Tower

Ark Hills Sengokuyama Mori Tower

Ark Hills Sengokuyama Mori Tower: Redefining Urban Vertical Living in Tokyo

Nestled in the heart of Tokyo’s prestigious Roppongi district, the Ark Hills Sengokuyama Mori Tower is a soaring testament to the modern fusion of luxury, function, and sustainable design. Completed in 2012, this mixed-use skyscraper by the renowned Mori Building Company has become a symbol of high-end urban life, exemplifying Tokyo’s 21st-century architectural evolution. The tower forms part of the greater Ark Hills redevelopment project and continues Mori Building’s legacy of “Vertical Garden Cities” that blend residential, commercial, and green spaces in one dynamic structure.

Ark Hills Sengokuyama Mori Tower doesn’t just impress with its height—it redefines what it means to live, work, and interact with nature within one vertical ecosystem.

Concept and Vision

Mori Building’s architectural philosophy hinges on creating compact, sustainable, and highly livable urban spaces that integrate functionality with beauty. The concept of a “Vertical Garden City” is central to this vision, emphasizing mixed-use buildings that are energy-efficient, earthquake-resistant, and rich in green spaces—even in densely populated areas.

Ark Hills Sengokuyama Mori Tower continues this approach by blending offices, high-end residences, shops, and open green areas in one cohesive structure. Located strategically between the business districts of Toranomon and Akasaka, the building enjoys proximity to major embassies, cultural venues, and public transportation, making it one of Tokyo’s most sought-after addresses.

Architectural and Structural Design

The architectural design of the tower was developed by Irving Smith Jack Architects in collaboration with Nikken Sekkei, a leading Japanese architectural and engineering firm. The exterior is both sleek and commanding, with glass and aluminum panels that reflect the city’s ambient light by day and shimmer with interior warmth by night.

Its structural engineering incorporates cutting-edge earthquake-resistance technology, making it one of the safest tall buildings in Japan. A steel-reinforced concrete (SRC) structure forms the core, combined with viscous dampers and base isolation systems that minimize shaking during seismic events.

Beyond engineering, the building’s architectural detailing integrates natural elements into vertical and horizontal planes. Green terraces, rooftop gardens, and landscaped plazas soften the transition between the building and its surroundings, creating an urban oasis that blurs the line between interior and exterior life.

Technical Specifications

Below are the detailed technical specifications of Ark Hills Sengokuyama Mori Tower:

• Name: Ark Hills Sengokuyama Mori Tower
• Japanese Name: アークヒルズ仙石山森タワー
• Location: 1-9-10 Roppongi, Minato-ku, Tokyo, Japan
• Developer: Mori Building Co., Ltd.
• Architects: Irwin Allen Smith (design), Nikken Sekkei (design + structural engineering)
• Structural Type: Steel-reinforced concrete (SRC) and steel frame (S) with seismic damping systems
• Height (Roof): 206.7 meters (678 feet)
• Total Floors: 47 above ground, 4 below ground
• Total Floor Area: Approx. 143,000 square meters
• Completion: August 2012
• Primary Uses: Office, residential, retail, amenity spaces
• Residential Units: 243 luxury apartments
• Parking: Approx. 500 spaces (including mechanical parking system)
• Elevators: 25 high-speed elevators, including separate banks for office and residential use
• Seismic Features: Base isolation, tuned mass dampers, viscous wall dampers
• Green Space: Over 1 hectare of gardens, terraces, and green roofs
• Energy Efficiency: LEED-equivalent green building features, including smart lighting and air-conditioning systems

Mixed-Use Functionality

One of the defining features of Ark Hills Sengokuyama Mori Tower is its mixed-use functionality, which brings together a range of purposes within a single structure:

Office Floors

The lower to mid-level floors are devoted to high-spec office spaces equipped with advanced telecommunications infrastructure, smart climate control, and energy-saving lighting. Tenants include multinational corporations, financial institutions, and technology firms, all drawn by the tower’s prime location and prestige.

Residences

The upper floors house 243 high-end residential units, offering panoramic views of Tokyo Tower, Tokyo Bay, and even Mount Fuji on clear days. These apartments range from one-bedroom executive flats to expansive penthouses. Interior finishes are of the highest quality, featuring imported stone, hardwood flooring, custom cabinetry, and smart home integration.

Residential facilities include:

• Concierge service
• Residents’ lounge
• Fitness center and spa
• Private meeting rooms
• Wine cellar and storage
• 24-hour security and controlled access

Retail and Public Amenities

At the ground level and podium floors, the tower includes luxury retail shops, cafés, and fine dining establishments. Landscaped terraces and courtyards make the public areas feel open and inviting, contributing to Mori Building’s mission of urban revitalization.

Sustainability and Innovation

The Ark Hills Sengokuyama Mori Tower incorporates a range of green technologies that reduce environmental impact and enhance the comfort of its users. Key sustainability features include:

• Double-glazed curtain walls for thermal insulation
• Automatic lighting systems based on occupancy and daylight levels
• Energy-efficient HVAC systems with smart zoning
• Rainwater harvesting for irrigation of rooftop gardens
• Natural ventilation shafts incorporated into the building’s core
• Use of low-VOC (volatile organic compound) materials for healthier interiors

While not officially LEED-certified, the building was designed to meet and exceed Japanese environmental standards, and many of its elements are comparable to international green building certification systems.

Earthquake Safety

Given Tokyo’s susceptibility to earthquakes, the building employs some of the most advanced seismic protection technologies in the world:

• Base Isolation System: Massive bearings at the foundation level allow the building to move independently of ground motion, absorbing seismic energy.
• Tuned Mass Dampers: These large counterweights shift in opposition to sway during wind or seismic activity, stabilizing the structure.
• Viscous Wall Dampers: Devices embedded within structural walls that dissipate vibrational energy during earthquakes, reducing stress on the frame.

Thanks to these features, Ark Hills Sengokuyama Mori Tower exceeds Japan’s stringent post-1995 seismic building codes.

Urban Integration

The building connects to Tokyo’s intricate transportation network via a short walk to Roppongi-itchome Station (Tokyo Metro Namboku Line) and is within easy reach of Tameike-Sanno and Kamiyacho stations. This centrality has made it a magnet for both business and high-end residential interest.

It is also part of the broader Ark Hills district, which includes the original Ark Hills Tower, Suntory Hall, and the ANA InterContinental Hotel. The area hosts seasonal festivals, outdoor concerts, and farmer’s markets, making it a vibrant, community-oriented urban hub.

Conclusion

Ark Hills Sengokuyama Mori Tower stands as one of Tokyo’s most sophisticated and forward-looking buildings. It brings together elite design, top-tier amenities, and cutting-edge engineering in a vertical complex that reflects the changing face of urban living in Japan. For those who seek security, luxury, sustainability, and connectivity, few addresses rival what this tower offers.