Abstract
The purpose of this paper is to clarify the condition of income disparities within regions by analyzing regional incomes in smaller unit than previous studies. First, we calculated income disparities within each region by Theil inequality measure. As a result, income disparities within metropolitan regions are increasing recently and it became bigger reason of increasing regional disparities of all Japan. Second, we analyzed population structure and age composition which causes increase of income disparities by cluster analysis. As a result, it was shown that high income people are gathering to particular municipalities affected by back-to-the-city movement and that causes differentiation of residence by income bracket.
