During volcanic disaster of Mt.Fugen in Unzen, a ground surface augmentation project is adopted to reconstruct the livelihood of the disaster victims in Annaka Triangle zone of Shimabara City. By implementation of this project, not only the house that has suffered a great deal of damage but the house which has not suffered a great deal of damage relocated. Since there was no existing official support system about this project, how to twist the precedent of using Annaka triangle zone as a place of disposing debris flow sediments was enforced.
The purpose of this paper is to consider how residents' considered the project and made decisions.