2026 年 37 巻 p. 46-55
Concerns over the sustainability of local communities have drawn attention to the “relationship population” as a possibility for regional revitalization. This study qualitatively clarifies how exchange populations transform into relationship populations and how ongoing regional engagement is cultivated. Using the Trajectory Equifinality Approach (TEA), the transformation process is analyzed and visualized through TEM diagrams, revealing how repeated exchange experiences shape regional interest and engagement. For the narrow relationship population, self-actualization, rather than altruism, drives ongoing engagement, with altruism emerging later through regional activity. The broader relationship population, by contrast, is sustained by psychological comfort and the continued discovery of seasonal novelty. These findings complement prior quantitative research and offer implications for regional policy design, with both academic and social significance.