The structural change in the region is advanced in the population decrease and the less children and aging society. In the suburban city, an economical big difference arises by the factor such as getting depressed of revenue by a decrease in the working age population between big cities, and it becomes a serious problem. The government promoted strengthening the base of the local finance like promotion and merging of municipalities and the fiscal reform. City Hall external space including citizens free go in and out use space citizens use related to space pay attention space how compose change clarify future City Hall plan the ideal way finding obtain aim.