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Otemachi 1-Chome 2nd District, Category 1 Urban Redevelopment Project

Otemachi's New Landscape

An interlinked series of urban redevelopment projects are moving forward in Otemachi.
A new flagship property has been born at this international financial hub.

Project Philosophy

A range of different companies are gathered in the Otemachi area: financial, information & communications, and mass media etc.
Most of the buildings situated in this area were built in the same timeframe (circa 1965) and
deterioration amongst these properties has become noticeable. The need for functional redevelopment/highly intense utilization of the land as a core business area has been called for.

"Inter-Linked Urban Redevelopment"

A process called "Inter-linked Urban Development" has been leveraged to proceed with the development while maintaining the high standard core functions of businesses.
The site of the old Otemachi Integrated Government Office Complex ("Goudouchousha") has been utilized without causing any halts or interruptions to businesses within this area. The interlinked urban renewal method has been employed to update the overall site in stages successively.
This is so that Otemachi will continue as the heart & core of Japan`s economy.
So that Otemachi ranks equal in the world as a strategic business base.
And so that workers working here in Otemachi find the city pleasant...
To excite and exceed the expectations of firms/individuals that gather in Otemachi, stages 1,2 & 3 of this large project will be rolled-out one after the other.

Otemachi Financial City as a Flagship Development

The "Otemachi 1-Chome District, Category 1 Urban Redevelopment Project" (completed April 2009) was followed by the second wave project: "Otemachi 1-Chome 2nd District, Category 1 Urban Redevelopment Project" (completed October 2012). A twin tower redevelopment building "Otemachi Financial City" was built on the first redevelopment leaseholder's site.
In line with the project theme "Appropriate facilities for the Otemachi international financial hub", two towers were built with a combined gross floor area of approximately 242,500m2.
Urban development appropriate for an international financial hub will be further pursued by linking with a third phase of redevelopment.

1. South Tower

"Tokyo Financial Village" is a place of interaction and for nurturing financial workers. "St. Luke's MediLocus" international health care services facility has been opened.
The property is a new flagship building with a prominent presence in Otemachi.

2. North Tower

On offer is over 19 floors consisting entirely of rentaloffice space with unobstructed panoramic views of Tokyo.
An elegant entrance appropriate for an international financial hub and ample common space provide businesses with great additional potential.

Creating Our Precinct

We are sparing no effort in developing an overall revitalized cityscape that caters not just to business.

1. Creating Green Zones/Pedestrian Networks

On the west side of the South Tower, shady nooks have been created along the Zelkova-lined sidewalk.
A three-dimensional green-space has been created at the lunch terrace on the mezzanine.
This is an extension of the busy "Nakadori" high-street concept seen in the heart of the Marunouchi area.
A pedestrian-dedicated path has been built along the north side of the Nihonbashi River which share the same vibe as the first block in the Otemachi precinct and is part of the urban plan to encourage foot traffic.

2. Column-less Spaces of Approximately 2310 m2 per Floor

Relaxed room spaces with 2.8m ceiling height provision.
Flexible arrangements can cater for any business type, and open-layouts are possible.

3. Creating Comfortable Office Environments

he grid-ceiling system is has few partition constraints. Office layouts can be arranged in detail to enable space personalized utilization of spaces.
We support the creation of ideal office environments.

4. Various Measures to Reduce CO2 & Prevent the "Heat Island" Phenomenon.

The heat island phenomenon has been mitigated through tree-planting within/outside the site and the use of water-retentive paint.
Energy-saving measures are also incorporated: district heating and cooling systems (DHC), Low-E Double Glazing, and a natural ventilation slit beneath the window sash.

5. Contribution to BCP Measures & Local Disaster Prevention

Building facilities can operate for approximately 72 hours when powered by emergency generators.In the event of a disaster, the atrium will be provided as a space for visitors, relief supplies will be issued and relief activities take place.

Development Episodes & Changes to the Otemachi Landscape

nterlinked urban redevelopment project Phase 2: Building of "Otemachi Financial City".
We asked the people in charge of development about the buildings and precinct.

Linking projects, linking precincts

--The heights of the twin towers differ, and I sense that each has a distinctive design. What was the intention?

The height of the north tower was kept down to avoid overwhelming the Kanda area. The south tower faces north-south and is configured to convey an in-row cityscape rhythm. Exterior design: The challenge was how to brush up the idiosyncratic North Tower while conveying an overall sense of unity. For example, the east and west facades place emphasis in the vertical direction. While the pitch of the columns in the North Tower was 7.2m and the pitch of the columns in the South Tower was 3.6m, the color of the lines and materials installed between the columns was carefully considered to place overall emphasis on the 3.6m pitch.For the north side, priority was placed on achieving harmony with the Kanda-side cityscape. Another key feature is the inclusion of a large opening to create a great unobstructed view of the landscape. The random window layout on the north side was designed to mitigate any sense of overwhelming and to convey a feel of rhythm. All this while doing away with any sense of being inside a building by using an ingenious design scheme to remove anything obstructing the view. Consideration of the environment was also an important theme. Column shapes and horizontal fins are employed on the east-west sides, Low-E Double Glazing employed overall serves to shield people from the sunlight, and thermal load is effectively reduced in each direction.

--"Enhancing pedestrian networks " was also an important theme in Phase 2 of the redevelopment project.
"Connecting" is a keyword used in our application proposal to be the nominated builder, but is also runs through all of our interlinking redevelopment projects. Developing pedestrian networks is indispensable part of: connecting each separate project, connecting existing and new towns, and to developing bustling and appealing towns. In Phase 2, we extended the "Nakadori"(high-street) concept from the Marunouchi area right into the west side of the site, to create a pedestrian space with abundant greenery. While generating pedestrian activity by placing retail shops along the street, a lunch terrace with ample trees and plants on the mezzanine creates a three-dimensional green space where pedestrians can rest as opposed to just passing through. In the future, a pedestrian-dedicated path will be built along the Nihonbashi River so that pedestrian flow will connect from Tokyo Station to Otemachi, and from Otemachi to Kanda.The atrium connecting the North Tower and South Tower is being designed as a gateway and starting point for this path.Also, the retail shopping area on the first basement level is directly connected to Otemachi Subway Station. The underground network is planned to connect with the Phase 3 redevelopment zone while maintaining the width of pedestrian paths.

Otemachi's New Landscape

--Demand for buildings that remain strong in disasters How will these buildings fare during emergencies?
Whether or not a building can withstand a naturaldisaster is an important office building selection criteria.In response to such needs, firstly, electrical power supply from an emergency generator can operate some lighting in common areas and support important building facilities for approximately 72 hours.Also, space has been allocated for a generator that can be installed according to tenants` wishes.In addition, a storage room is set-up with ample stocks of emergency supplies including medical supplies, medicine, food and drink. We plan to contribute to local disaster prevention by providing our atrium and empty grounds as a refuge area for Otemachi visitors during a disaster. An injury response system is being prepared in collaboration with a medical facility ("St. Luke's Medilocus" that opened in the South Tower) to assist the injured in collaboration with the medical institution "St. Luke's Medilocus" that opened in the South Tower.This clinic has English-speaking staff on duty at all times, so non-Japanese office workers and tourists can take refuge here with peace of mind.
--We participated in the planning process as the lead representative of the 4 designated builders.。
Yes, in the Phase 2 of the redevelopment project, we participated in the planning as the designated builder fitting-out Tower A (North Tower), and we were the lead representative of the 4 designated buildersThe building functions as an international financial hub by virtue alone which lead to the leaseholder demanding high standards with the specifications and operational management. How this expectation was to be reflected was a management challenge. Above all else, creating a security and management framework that everyone was satisfied with was a difficult process. Another point was that from an asset management business viewpoint, our firm took on the important role of checking the designs/specifications point-by-point.We focused our attention on how people could use this building to its fullest potential over the long term, and how to have people utilize the building safely and reliably without accident. We considered these matters in great detail. For example, we considered measures for preventing the leakage of water into offices if pipes burst in the event of earthquake. As well, we have considered ways to maximize the safety and user-friendliness of the parking lot, such as by adjusting road signs, traffic lines, and the layout of the parking lot.Within these numerous constraints, we are proud to have created something of higher quality in collaboration with associated companies.
--Finally, do you have a message for visitors to Otemachi?

Through our involvement with this project, we reaffirmed how a building is given life through the coming and going of people. We engaged in our work while visualizing the flow of people from the entrance, to retail shops, to offices. We most want the public to stop by and see "Otemachi Financial City" for themselves. There are many points of interest, such as the atrium that serves as a gateway and the green space where visitors can relax and catch their breath. Visitors are sure to sense Otemachi's new heart beat.The next step is to focus even more on town's appeal I believe.We hope to continue to be a part of Otemachi's redevelopment and contribute to urban development.

Interview with Development Representative

NTT Urban Development Corporation
Eri Toda, Development Promotion Department (left)
Toshiyuki Shingai, Development Promotion Department (center)
Masaki Hayashi, Development Promotion Department (right)

Assigned to these departments at time of this interview