Mitsubishi Estate’s Concept of the Office BuildingSafety, Security & BCP

Buildings, people and the community – only when all three elements work together as one is true safety achieved.

”Remember 3.11”
– our wish to create a safer community.

The Great East Japan Earthquake struck on March 11, 2011.
On that tragic day, transportation was paralyzed and thousands were unable to return home. We sheltered approximately 3,500 people who were stranded in the city in ten of our buildings in the Marunouchi and Yokohama areas.

Mitsubishi Estate and the Great East Japan Earthquake (March 11, 2011)

“Safety & Security” first, always, and in everything we do.

From the moment the first line is drawn on the blueprints to the everyday management of diverse services, Mitsubishi Estate office buildings reflect our uncompromising commitment to safety and security – a dedication to safety that began with the construction of the Mitsubishi Ichigokan in 1894.

Building towns even disasters cannot stop.

Our concept of the Business Continuity District (BCD) links the entire area together to counter disasters. Adoption of this policy enables our office buildings and the district to integrate their strengths and present a unified solution to the challenges of various types of disaster.

BCD in the Tokyo Area (Otemachi, Marunouchi and Yurakucho Area)

Mitsubishi Estate Office Building Safety, Security and BCP

  • In a water supply outage, rainwater, wastewater and well water can be reused as toilet flushing water.

  • “Dual fuel” power generators can be powered by city gas supplied by highly seismic resistant intermediate-pressure gas pipeline.

  • 72 hours of power supply from emergency power generation systems.

  • Storage of emergency food, medical supplies and equipment including bicycles.

  • Anti-slip treatment of glass floors for everyday safety.

  • Pavement designed for comfortable walking even in high-heeled shoes.

  • Establishment of a cooperative system of general constructors and utility service companies to accelerate emergency repair work and the restoration of services.

  • “Earthquake Damage Assessment System” for prompt assessment of building integrity and hazards.

  • Deployment of MCA (multichannel access) and IP wireless devices in an emergency for timely communication of information.

* Available facilities vary depending on the building.

”Disaster Management Center Building” contributes to district-wide BCP

Robust disaster prevention functions are achieved by linking neighboring buildings in the district together in a network with Mitsubishi Estate’s Disaster Management Center at its heart providing critical coordination.

Conceptual image of “Disaster Management Center Building”

Otemachi Financial City Grand Cube is the planned site of the DMCB for this area.

Environment that supports business continuity even when disasters strike

Stockpiles of emergency supplies in several locations including aboveground floors to facilitate efficient distribution

Vital machine rooms in aboveground floors in case of flooding

“Dual fuel” power generators that can use either stored fuel oil or city gas supplied by highly seismic-resistant intermediate-pressure gas pipelines

Supply of 100% the building’s power needs

Continued supply of safe drinking water and independent sewage treatment function

Top-class seismic performance able to withstand extreme earthquakes (Shindo Seismic intensity of 7)

Effective vibration-control structure that can effectively counter long-period seismic ground motion

Elevators resistant to long-period seismic ground motion

Accommodations for emergency staff

Marunouchi Vision for dissemination of disaster information

System for temporary sheltering/assistance for stranded people

Large-capacity emergency fuel oil tank

Watertight doors to prevent flooding damage to vital machine rooms

Flood barriers at building and store entrances and exits to prevent water damage

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
1

Top-class seismic performance able to withstand extreme earthquakes (Shindo Seismic intensity of 7)

2

Environment that supports business continuity even when disasters strike

3

Effective vibration-control structure that can effectively counter long-period seismic ground motion

4

Elevators resistant to long-period seismic ground motion

5

Stockpiles of emergency supplies in several locations including aboveground floors to facilitate efficient distribution

6

Accommodations for emergency staff

7

Marunouchi Vision for dissemination of disaster information

8

System for temporary sheltering/assistance for stranded people

9

Vital machine rooms in aboveground floors in case of flooding

10

“Dual fuel” power generators that can use either stored fuel oil or city gas supplied by highly seismic-resistant intermediate-pressure gas pipelines

11

Large-capacity emergency fuel oil tank

12

Watertight doors to prevent flooding damage to vital machine rooms

13

Flood barriers at building and store entrances and exits to prevent water damage

14

Supply of 100% the building’s power needs

15

Continued supply of safe drinking water and independent sewage treatment function

Mitsubishi Estate and the Great East Japan Earthquake (March 11, 2011)

The Great East Japan Earthquake struck on March 11, 2011.
Mitsubishi Estate buildings in the Marunouchi area sheltered a large number of office workers and visitors stranded in the area who could not return home.


Although the authorities did not immediately declare an extraordinary disaster because the initially announced seismic intensity was a high but not severe “Shindo 5-upper”, our staff decided to provide continuous air conditioning operation through the next day, turn on lighting in lobbies and other common space areas, make toilets available for public use, and provide PVC “blue sheet” tarpaulins. Shops and restaurants in the area pitched in and provided food and other valuable support, enabling us to provide stranded people with aid, comfort and a place to rest in our buildings.


For Mitsubishi Estate, “3.11” was not simply about providing tenants with a safe and secure building. It was a moment when everyone in the area – the businesses, shops and restaurants – came together as a single community and stood up against the disaster. We believe that true safety only happens when buildings, people and the district are unified in their efforts to achieve safety, and this was a concrete example of our philosophy in action.


We at Mitsubishi Estate have made “safety and security” an integral part of our corporate culture. Swift and proper response to disasters is a reflex, engrained in the consciousness of every employee over our long history of repeated drilling and education. Reflected in every thought and deed, our high awareness of the correct disaster safety measures in the event of an earthquake or other disasters translates into swift action when that moment comes. Never satisfied with the status quo, we are constantly seeking ever higher standards of safety and security, and are determined to provide buildings, people and the community with even stronger disaster prevention measures in the future.

Our continuous practice of disaster prevention measures
embodies our dedication to “Safety and Security”
- two words at the heart of all value creation at Mitsubishi Estate Group.
Our response to the hopes and dreams of all begins and ends with…

A love for people.A love for the city.

For more information and inquiries:

[toll-free] 0120-339-520 [From cell phones] 03-3287-5310 *From 9:15 to 17:45 (weekdays)