Abstract
This is the ninth report of fundamental investigations for the planning of the public library system to community area. The paper describes the way of planning the library system to regional area based on our theory which had been carried out since the first report. We present here as a case study to plan the libray network actually to both regional area of Tokyo prefecture with aprox 11640 thousand population in 1740km^2, and Saitama prefecture with aprox 4820 thousand population in 3800km^2. In the case study we show that 1) how many libraries and bookmobiles shall be planned in the regions, 2) where they are located, 3) how many figures are given to each library : the number of books, the number of staffs etc, by number of book circulation per capita and the accessibility to the nearest library. In addition we show how the exsisting service levels are evaluated compared with the planning level by which the public planning authority can judge the situation and set up the additional plan for their library system.
