In 11th March 2011, Great East Japan Earthquake that has Mw 9.0 attacked to East Japan, and it caused serious damage not only to human but also to industrial facilities and so on. In addition, lifelines, such as water, electric power and so on were broken and the quake-hit area was wide. Therefore the disaster had a harmful influence on the Japanese industry. In order to investigate factors of the seismic damage of mechanical structure and improve preparedness for the future earthquakes, The Japan Society of Mechanical Engineers (JSME) has set up an investigation committee. This paper describes the seismic damages of industrial facilities by the 2011 Great East Japan Earthquake. The damage by the disaster was serious. On the other hand, some good practice to prevent seismic damage was reported For example, vibration control damper of a building operated effectively. Employees of companies dealt with problems by the disaster effectively, in consequence of training for accident.
