The Interregional Input-Output Table of Tokyo Metropolitan Government

Abstract

The main purpose of this paper is to describe the “Tokyo Metropolitan Interregional Input-Output Table for 1993” (TMIIOT). TMIIOT has been complied for assessing the economic function of Tokyo megalopolis in Japanese economy based on the framework of input-output analysis.It is essential to split out the process of production regarded as a single production sector in the conventional model, so that it correctly reflects the interregional division of production activities within enterprises. In the framework of TMIIOT, each conventional sector is devised into several sub-sectors and then each secondary sector is consisted of the head offices.Such features of TMIIOT are reflected on the framework, which is applied to the interregional input-output system between two regions, the Tokyo Metropolitan Area (TMA) and the rest of Japan. The most detailed table, which is called the basic table (1990), has a huge transaction matrix: 607 (row) × 491 (column) intermediate sectors for TMA, and 595 (row) × 479 (column) for the rest of Japan. The half of them represents indirect production sector consisted of head officies.TMIIOT (1993) shows the magnitude of direct interregional interdependence formed through production activities of two regions. We shows the overall structure of two regions as observed from TMIIOT (1993).We found the following facts by comparing the Input-Output Table of these two regions.(1) The total regional output in Tokyo is 147.7 trillion yen. It's proportion to the total domestic output of Japan is more than 14.0%, while the proportion of population of Tokyo is approximately 15.7%. The difference between these proportions characterizes the Tokyo economy.(2) The value added induced in Tokyo is estimated at 83.4 trillion yen, of which proportion to the total of Japan is 17.0%. This proportion is clearly higher than that of population of Tokyo mentioned above. It is also the characteristic feature of Tokyo economy.(3) Tokyo has the large amount of final demand, 44.3 trillion yen. However, its amount is smaller than the value added, 56.1 trillion yen. The excess of value added over final demand in Tokyo means the net income transfer from Tokyo to the other.