Abstract
This study analyzes the challenges of building collaborative structures through participant observation in a regional project involving local government, private sector, and academia in Gamagori City. Three key decision-making tendencies were identified: hesitation toward correction, low awareness of sunk costs, and cognitive bias in new investments. These findings suggest an asymmetry in value recognition between correction and investment. Understanding this asymmetry can help facilitate smoother consensus-building in collaborations. Future research should broaden the scope and incorporate internal perspectives of stakeholders.