The Tokai region, including the prefectures of Aichi, Shizuoka, Mie, Gifu, and Shiga, in the center of Japan’s largest island, Honshu, houses clusters of the motor vehicle industry (MVI) and accounts for more than 50% of the domestic value from the MVI’s manufactured goods shipments. The subcontracted factories in the MVI tend to locate their main hub close to the assembly factories, creating large supply-chain structures with wide transactions. Since the 1990s, new automotive assembly factories and subcontracted factories have been built outside Aichi, in the Kyushu and Tohoku regions. This may have had an influence on local industries and economy. This study applies the hypothetical extraction method to the Tokai region using the Chubu-region multi-regional input–output tables to understand the secular changes of interdependencies in the MVI as each prefecture in the Tokai region has automotive assembly factories. The study shows that the Aichi MVI has strengthened its ties with industries in other prefectures in the Tokai region and elsewhere because the rate of growth for Aichi dropped from 2005 to 2010. Still, other prefecture rates rose, thus expanding its supply-chain structure throughout Japan more than before. In addition, the study shows that the Shizuoka MVI has increased business relationships not only within its region but also with Aichi. These results highlight that the industrial linkage between the Aichi MVI and the Shizuoka MVI has deepened. However, the results show that the supply-chain structures of the Mie, Gifu, and Shiga MVI have remained inside of their respective regions.

The aim of this paper is to integrate tourismrelated industries in the Chubu Region. We point out the following points. Spread of average length (Average Propagation Length) was used for the analysis of tourismrelated industry clusters. Results of typical examples of residential tourism in the Chubu Region were analyzed by using the average spread length for a tourismrelated industry in Toyama Prefecture, and a tourismrelated industry in Aichi Prefecture as typical urban tourism in the Chubu Region.

Aichi, in Japan’s Chubu region, houses clusters of the motor vehicle industry (MVI) and has over a 50% share in the domestic value of the MVI’s manufactured-goods shipments. Since the 1990s, automotive assembly factories built outside this region have changed the clustering patterns of the MVI. As the MVI has a pyramidal supply-chain structure, changes to the clusters also affect suppliers. To understand the secular change of interdependencies in the MVI, this study applied the hypothetical extraction method (HEM) to Aichi and other regions using the Chubu-region multi-regional input-output table. For “Aichi MVI by HEM,” although extraction of the “Aichi MVI” in 2010 reduced by approximately 13.8% compared to 2005, the rate of decline in production for other regions demonstrates an increasing trend, indicating that transactions of the Aichi MVI extended to businesses in other regions. For “outside-Aichi MVI by HEM,” the rate of decline in production for Aichi shows an increasing trend. This rate of decline is higher when HEM is applied to “Aichi MVI.” These results highlight Aichi MVI’s strong relationship with industries in the Chubu region, and an even stronger one with industries in other regions.