This survey, based on a survey conducted by the Development Bank of Japan (DBJ), examines the effectiveness of existing disaster preparedness and business continuity efforts. In this paper, we want to point out the following points to present approaches for improving business continuity capability. First, it is necessary for businesses to share business continuity planning (BCP) information in-house, to expand this function in the future, and to create a mechanism for sharing information within the supply chain and industry groups. Second, the key is in improving business continuity capability for the three elements of: formulating BCP (soft countermeasures), improving response by sharing strategy and strengthening against earthquakes, and implementing hard countermeasures by developing a backup system. Third, it is important to incorporate elements of BCP into core business undertakings in order to ensure that business continuity efforts go beyond temporary measures alone (sustainable BCP).