Abstract
Many projects aiming for environmental restoration have been conducted in semi-enclosed coastal waters in Japan. Although investigations on each of these projects have also been done from technical and social-economic respects, few studies cover inter-comparative analysis among these projects. The objectives of the present study are thus to identify the key factors enhancing the possibility of project implementation and leading to its success by reviewing and comparing a large number of implemented and failed projects so far in Japan. We find out five key points that should contribute to the realization of projects: (1) local demands, (2) internal triggers for the smooth implementation, (3) environmental regulation action, (4) cooperation and participation of stakeholders, and (5) preliminary field experiments with promising results. For realizing environmental restoration projects in the future, it is important to consider these keywords as many as possible when preparing proposals.
