Abstract
A large number of residential estates were constructed all over Japan in the period of high economic growth. However, as time goes on, their residential estates have numerous problems such as deterioration of buildings, low fertility and aging of population and so on. Those problems, particularly, could be caused in Oita city where residential estates increased rapidly after designation of‘New Industrial City’in 1964. Therefore, the purpose of this study is to grasp the current situation of living environment on the residential estates and find the measures to improve the quality of living environment for sustainability. The method of this study is as follows. Firstly, the forward projections for population figures are computed using cohort estimation method and the population change is grasped in the residential estates which are more than 5ha in Oita city. Next, the accessibility of living convenient facilities and the convenience of public transportation are measured. Then, the principal components of those factors are analyzed to grasp their characteristics of living environment on the residential estates. Finally, the residential estates are classified into 6 groups based on the principal component score using the cluster analysis and several improvements of each group for sustainable residential estates are suggested.
