抄録
The construction of the Tohoku Shinkansen between Tokyo and Morioka for 500kms will be completed by 1976. As is well known, Shinkansen is the speediest transportation medium at present that runs on the ground, and it has a great influence upon regions around it. How will the Shinkansen affect the prefectures of Tohoku District, Fukushima, Miyagi, Iwate Aomori Akita and Yamagata by its construction?
It cannot be said that the method to calculate the affection upon a rigion is well developed when the speedier transportation medium takes place of the slower one.
The authors tired this calculation by means of the Demographic Potential, later succeeded by forming the concept of the Demographic Energy.
Demongraphic Potential and Demographic Energy the explained as follows: i, j, k, l region
Xi Xj Xk Xl population of each region (in unit of 100 persons)
Rij Rik Ril tripping time from i to j, k l…(minute)
Putting ΔE=Ei2-Ei1 where Ei1 denotes the value by the older transportation medium and Ei2, the one by the newer medium, them Y in region i increases A Δ E respectively.
Y....population employed persons, income trade sales, number of estableshments, motor vehicle, value of manufacturing shipments, etc
A....coefficient
Thus, ΔE of Fukushima, Miyagi and Iwate by Shinkansen operation, can be calculated, and similarly the influence upon Aomori Akita and Yamagata can be estimated. These influences will supposedly give shock to each region.
On the other hand the authors know that the shorter the trip time between the cities in a region becomes, the bigger the Demographic Energy results in, and the economic conditions will change greatly as a consequence. Therefore, the economic conditions in a region can be improved by shortening the tripping time among cities in it.
In order to make the shock of Tohoku Shinkansen very efficient, the formation of the Dynapolis, shortening the tripping time among cities in a region may be appropriate. The Dynapolis which stands for dynamic polis, is first proposed by C. Doxiadis.
For example the authors propose that the Dynapolis in Iwate Prefecture to be formed throngh speeding up the trips among the cities of Ichinoseki, Mizusawa Kitakami Hanamaki and Morioka in Iwate Prefecture.
