Abstract
In this study, in particular, the authors are focusing on software measures of the companies for the largescale disaster such as Business Continuity Plan (BCP), and have investigated the possibilities and the way of mutual cooperation and collabolation for business continuity. However, the Great East Japan Earthequake has brought us the change of the consciousness to the preparedness for the large-scale disaster, such as earthquakes, volucanic eruptions, and flood damages. By comparing the results of hearing investigation before and after that Great Earthquake, the authors have examined the impact on the build-out process of mutual assistance between companies. A new structure called "Business Continuity Safety-Net" by the cooporation and agreement between companies is expected to its effectiveness, and to be beneficial to the enterprises which are struggling with self-help efforts.
