Abstract
NTT DATA, a system integrator, provides many socially important nationwide systems or services. It is assumed that if the systems are corrupted by a disaster, such as an earthquake, it will cause a great impact to the society. Recently, it has been said that a massive earthquake may come. As opposed to the risk that assumes the occurrence of the disaster, we reviewed the conventional formal disaster prevention activities and established a new corporate contingency plan in the viewpoint of how quick and exact actions can be taken at the time of an actual disaster. This paper describes the overview of the contingency plan and training, which is necessary to validate the plan.