Disaster-resistant area

According to a survey by the Tokyo Metropolitan Government, Marunouchi area 
has a low "building collapse risk" and "earthquake fire risk". The total risk is the lowest "Rank 1" area.

“Area” disaster prevention measures

In the Marunouchi area, we have secured an "Area Disaster Prevention Building" with advanced disaster prevention capabilities that will serve as the district's base in the event of a disaster.
In addition, Marunouchi is the resistant area from the aspect of ICT, because we have established an information hub function that collects, edits, organizes, and distributes information including local information.
through public-private partnership

Contribute to the BCP of the entire area,
 "Disaster management center building"

A stronger disaster prevention function for the entire area is realized through cooperation with surrounding buildings.
At the center of collaboration is Mitsubishi Estate's "Disaster management center building."

Formation of a next-generation disaster prevention center with
        information hub functions through public-private partnership

Disaster dashboard to consolidate wide-area and local information

Electric power grid network to support business continuity

We have secured power grid network and back-up power to support the business continuity of our tenant companies.

Stable power supply from multiple lines

Many buildings in the area adopt highly reliable Power Receiving System such as the "main line/backup line system" and the "loop system." Even if the power supply is interrupted due to a problem with the power transmission route, it is possible to continue receiving power by switching to another line.

Emergency generator fuel multiplexing

A dual-fuel system that enables power generation using medium-pressure gas supplied from an earthquake-resistant medium-pressure pipeline, which was undamaged even in the areas affected by the Great East Japan Earthquake, when the supply from the power grid is interrupted. We have installed generators or cogeneration systems (CGS) in all buildings Commencement after the 2011 Great East Japan Earthquake.

Implementation of a large-capacity oil tank

In order to keep the power supply uninterrupted for 72 hours when the energy infrastructure is expected to be restored, we have stockpiled emergency generator and a large amount of heavy oil to operate them.

Example of properties

Tokiwabashi Tower
Otemachi FC Grand Cube
Marunouchi Park Building
Marunouchi Eiraku Building

Highly stable
 energy network

Many buildings in the area have adopted a district heating and cooling system by our group (Marunouchi Heat Supply Co., Ltd.).
The plant and piping are installed in a highly earthquake-resistant Structure located 20 to 30 meters underground, which is not easily affected by earthquakes.
In addition, between plants, the supply piping system is networked and a backup system is constructed.
In addition, professional staff are stationed on a 24-hour basis.

Cogeneration system/utilization of waste heat

When the power supply from the power company is cut off due to an accident or disaster, the plant can supply a certain amount of heat by receiving power from emergency generator or cogeneration system. The cogeneration system is also in operation during normal times, so it can be smoothly switched to emergency operation. In addition, by connecting the waste heat to the heat supply network, it is possible to accommodate the area in a wide area, and we are also working to make effective use of energy.

Marunouchi-Otemachi-Yurakucho area energy network [SUPER TUBE]

"SUPER TUBE" is the tunnel roads and pipe networks that integrate cold/hot water and steam pipes. An efficient and highly reliable energy network enhances the area's disaster prevention performance and environmental performance.

"Don't forget 3.11" for safer city development

When the Great Kanto Earthquake occurred in 1923, Mitsubishi Estate's disaster prevention measures began with the provision of drinking water, the provision of hot meals, and the opening of a temporary clinic in and around the former Marunouchi Building.
After the Great East Japan Earthquake that occurred in March 2011, employees made their own decisions to operate the air conditioning in the building continuously until the next day, turning on the Lighting in Common Spaces, opening the restrooms, and providing blue seats. In addition, we were able to accept many stranded commuters because we were able to provide a place to rest for People who were stranded who had gathered at the building, thanks to the reassuring support of food supplies from nearby stores.
It was a moment when not only the building was safe, but also the people living there and the town/region, including the surrounding shops, came together to face the disaster. I believe that this is an example of the realization of the idea that true safety can only be achieved through this process.
Mitsubishi Estate has positioned "safety and security" as part of its corporate culture, and has a history of simply Building Height countermeasures. increase. Mitsubishi Estate will continue to strengthen its disaster prevention measures in the pursuit of safety and security.