STRUCTUAL ANALYSIS ON INTERREGIONAL FREIGHT TRANSPORTION CONSIDERING INTERINDUSTRY RELATIONSHIP

Abstract

  A novel method of estimating interregional physical distributions focusing on repercussions is proposed in this study. Physical distribution is viewed from two perspectives: derived and induced physical distribution. These concepts enable the evaluation of the relationship between industrial structure and physical distribution. Using the “Physical Distribution Census” published by the National Land and Transportation Ministry in Japan, methods of calculating physical distribution induced by a unit of final demand and physical distribution derived by a unit of production are developed. This framework can be considered as an input-output analysis of physical distribution, which combines physical distribution with either industrial production or household consumption. A case study of derived physical distribution shows that a ton of final demand of metal and machinery product in Tokyo generates 10.7 ton of physical distribution. Visualized result shows that supply transport disperses many place such as Osaka, Aichi or Chiba. A case study of induced physical distribution shows that a ton of production of farm and marine product in Hokkaido generates 2.5 ton of physcal distribution. Visualized result depicts that farm and marine products are processed and transported to many regions in Japan from Hokkaido. Then, we compare the estimated and actual amount of interregional transport between 47 prefectures in Japan over a year. We can validate our method since estimated transports fit well to actual transport.