After the Great East Japan Earthquake in 2011, delay of the community planning caused by the insufficiency of information sharing and consensus building in the community had become a bottleneck of reconstruction. In this research, we examined how to utilize the information system for such problem, and developed a map-based application to support solving the problem. The application has a function that illustrates how the facilities in the area would reconstruct according to its time using interactive maps and icons. In this regard, we got a good reputation: the feature makes it easy to share the concrete image of the reconstruction plan. In addition, regarding the function that supports consensus building, it was able to summarize the opinions of the residents effectively, and through the problem that emerged when we simulated its operation with local governments, we realized the necessity to consider from the standpoint of all people concerned with the community planning.
