This study evaluates the types of transaction structures in local firms that can help revitalize regional economies, focusing on the impact of business trade networks on regional economies. While previous studies identified a positive correlation between the balance of goods and services data and regional income data obtained from the prefectural accounts, this study confirmed that in/out transfers in inter-regional transactions show a positive correlation with regional income even from inter-firm transaction data. Although a regional economy cannot necessarily be judged quantitatively, an analytical perspective for regional economic growth/revitalization was developed using transaction data values as indicators. By transaction structure, the three major metropolitan areas exhibit the local service type, which generates many intra-regional transactions, and the connector type, which generates foreign currency acquisition. In addition to the national-link type, which generates significant extraterritorial transactions, the local service type and the connector type both generate a large amount of money circulation in a regional economy. Since this method was developed for quantitatively understanding a regional economy by elaborating the transaction structure on an individual company basis, it is expected to apply to future analyses.

Considering regional economic development in the global age, it has become particularly important to clarify the impact of corporate transaction structures and corporate behavior on regional economies. This paper aims to elucidate the real connection between the companies located in the San-in region that are driving regional growth and the regional economy and to examine the impact of the corporate transaction structure on the regional economy. We quantitatively measured the driving force (“earning power” and “spillover power”) of these companies by categorizing their transaction structure and analyzing money flow trends using B-to-B data. By interviewing the firms, we qualitatively confirmed the relationship between the corporate trading structure and the regional economy. This showed that the main type of companies in the San-in region is “the national link type”, which has a greater impact on the flow of money in and out of the region. It was also demonstrated that changes in business models and transaction networks alter the direction and magnitude of money flow and their associations with the regional economy. Since changes in transaction structures affect regional industries and economic spillovers, the development of a new framework to perform regional economic analysis integrating industry analysis and corporate transaction structure analysis is necessary.