Mitsui Fudosan, one of Japan’s leading real estate companies, and Kajima, one of Japan’s leading general contractors, developed the system to estimate damage of each floor of a high-rise building in earthquake. By installing the detector of tremor in 5-10 places, the system figures out the force of each floor and the deformation of the building in about five minutes using the data on direction and acceleration of the floor tremor. Because tremor and damage in earthquake greatly vary with the floor in a high-rise building, the system makes it possible to stop using heavily damaged floors to allow for prompt recovery and support for business operation. In addition, it is possible to evacuate people beginning with those on the floor highly susceptible to afterquake to reduce the secondary disaster. It costs seven million yen per building to install this system. Mitsui Fudosan plans to install this system in all of the 39 high-rise buildings it operates in the Tokyo metropolitan area.
Related web page: http://www.mitsuifudosan.co.jp/english/index.html