Number of Japanese 'shi-cho-son's (cities, towns and villages) was totally decreased to about one-third through the big merger in middle 1950's. We spent more than 40 years after the big merger, but the number of 'shi-cho-son's and the each size has been kept out basically. During these time, traffic conditions changed drastically (especially so called 'motarization') in this nation. The living and buisiness zone of inhabitants has been so expanded in the result. Also, in a couple of recent decades, 'the inclination to services in economy' has been become remarkable more and more. We discuss these phenomena has been caused by changes of economic structure in Japan. Especially, this fact is showed in migration of people beyond boudaries of 'to-do-hu-ken' (prefectures) region. We used migration statistics in time series from year 1954 to 1966. In conclusion, we recommend to merge cities, towns and villages so as to become appropriate size in economic scale (such as population) and also to get fruits of 'the inclination to services in economy'. In addition, we pointed some characteristic aspects of distant migration of people beyond boudaries of 'to-do-hu-ken' region.