What is most important concerning housing at present is how to repair and rehabilitate many of the buildings constructed in the Mass-Housing Period, especially the multi-family dwellings. This research was carried out with the purpose of gaining a perspective on the rehabilitation activities of the housing stock in Japan. In addition, this research is going to provide useful information for developing countries experiencing rapid population increase in cities and mass-housing by organizing a systematic classification of techniques, systems and backgrounds of rehabilitation methods in Denmark, France, Germany, Japan and the U.S., focusing on detailed case studies and comparative analyses. This study led to the following fruits. 1.The purposes, subjects and methods for renovating multi-family dwellings constructed during the mass-housing period were picked up and sorted out. 2.The described methodologies can be adopted into the rehabilitation of multi-family dwelling stock in Japan. 3.The proposed classification is useful for planning renovation projects.
