In this paper the relationship between duration of residence and evaluation of RS (Residential Satisfaction) is analyzed based on the dataset obtained from the recent UDC (Urban Development Corporation) survey in Japan. For this purpose, nonlinear smoothing using running medians was utilized for capturing distribution pattern of residents' dissatisfaction on their dwelling environment. The result demonstrates that long-term tenants are generally low in the evaluation of RS on their housing in proportion to their term of residence, on which the turning point of the ratio curve from satisfaction into dissatisfaction is about seven years from their move-in.

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In the present center of Osaka, although the reduction in a resident has induced various problems, in center of city in recent years, a sign of the population retrogression phenomenon of the increase in population is seen increasingly. Then, in this research, from a viewpoint that habitation in the center of city is required, after understanding the population movement in the Keihanshin city zone first, I clarified with the change that the past population movement in the center of Osaka, and the actual condition of a retrogression phenomenon in the center of Osaka and the movable factor of population, and it consider as an aid of habitation maintenance of future center of city.

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