The “Iino Building” Provides Office Space, Stores, and a Hall

—Large tenant office space with its carbon production cut in half!—

July 27, 2011Iino Kaiun Kaisha LtdTakenaka Corporation

The large-scale complex facility, the “Iino Building” built for Iino Kaiun Kaisha Ltd. (President: Tomoyuki Sekine), will open in early October. It was designed and constructed by Takenaka Corporation (President: Toichi Takenaka).
This project was the construction of a complex building including offices, the hall and conference center, and store area to replace the former Iino Building (1960 to 2008). Iino Hall, loved by many for about half a century, will reopen with expanded conference functions.
In the approximately 50,000m² tenant office area of the building, many energy-saving technologies have been introduced. As a result, while it is a large tenant office, its CO2 emissions will be about 50 percent of the CO2 emissions of another office building of the same size.

Comparison with the former Iino Building:
In the tenant office, transforming it into the most advanced environmental architecture while increasing its asset value by about 1.4 times the asset value before reconstruction, cuts CO2 emissions to about 70 percent of those prior to reconstruction, reducing its load on the environment.

Outline of the building

Building name Iino Building
Client Iino Kaiun Kaisha, Ltd.
Location 2-1-1 Uchisaiwaicho, Chiyoda-ku, Tokyo
Use Offices, stores, hall, conference room, and others
Building area approx. 4,600 m²
Total floor space approx. 104,000 m²
Structure S, CFT, SRC and RC
Height 143m
Work period March 2009 to September 2011 (Completion of 1st stage) to November 2014 (Completion of 2nd stage)

Technologies which cut carbon emissions in half

The entire tenant office part of the building is equipped with systems and devices which will make the maximum possible use of wind, light, and other natural energies to restrict loads (outer cladding, external air, and internal heat generation).
The high efficiency of devices and systems installed throughout the building will cut CO2 emissions, lowering its load on the environment without reducing the comfort of the building’s workers and visitors.
On the building, a solid vegetation base and watering system are installed and wind-breaks built, creating rich rooftop greenery combining tall and medium size trees, resulting in the building being the first high rise in Tokyo to receive a floor-area ratio bonus. On the aboveground open space constructed by second stage work, the “Iino Forest” will be planted linking it to the scenic greenery in Hibiya Park.

<Plan of standard floor>

Recreation of Iino Hall

<View of the inside of the Iino Hall>

Iino Hall designed with a sail-shaped ceiling and boat-shaped walls to create an image of a wooden sailing ship symbolizing the origins of maritime shipping companies will be reborn as a multi-purpose hall with seating for 500 people.
In the seating area of the hall, new seat air-conditioning technology which saves energy and ensures comfort has been adopted, and the hall is equipped with stage lighting and acoustic and projection equipment permitting its versatile use including lectures, film previews, rakugo, and concerts.
The lobby revives the materials used in the old hall, inheriting the hall’s long familiar atmosphere.