After the 1995 Kobe Earthquake, there were many co-housing project, in Japan, collective housing is more popular words. It starting from temporary housing for elderly peoples. About the 3.11 East Japan Earthquake, we do have termporary housing based on co-housing concept. For the permanet housing, I don't know any co-housing projects. However, I hope a co-housing project is emergeing for permenent housing project.