In recent years, the Japanese government has been encouraging the nationwide promotion of digital transformation initiatives. In Japan, however, many software-based ICT companies are concentrated in urban areas. In this study, we clarify how this fact affects the economic effects of digital investment made by local governments. Although this kind of analysis generally requires interregional input-output tables, only a few local governments have prepared and published them. In contrast, this study proposes a simple method that uses the intra-regional input-output tables published by all prefectures and the national input-output tables published by the Ministry of Internal Affairs and Communications. As a result, it was found that in the case of local governments with insufficient ICT industrial base, a considerable amount of the economic ripple effect derived from digital investment leaks out of the region. The results also indicate that the digital investment by local governments with insufficient ICT industrial base induces the leakage of employment effects, and might lead to a declining population.

Abstract: This research clarifies the economic ripple effect of contents tourism implemented mainly in Ube City, Yamaguchi Prefecture. The target content is a group of works created by Hideaki Anno, a video creator from Ube City. The analysis method utilizes an input-output table. As a result, it became clear that this tourism policy has produced an economic effect of approximately 1.3 billion yen. On the other hand, because input-output analysis requires specialized knowledge, there have been few cases of using input-output analysis to verify policies promoted by local governments at the municipal level in Yamaguchi Prefecture. In the future, we will continue to analyze the economic ripple effect, especially for measures taken at the municipal level, and quantitatively verify the measures.