Developed the initial foundation for the takamatsu-city/opendata repository, focusing on enabling demographic analysis and urban planning insights. Established a structured, analysis-ready environment by organizing data sources and integrating an Excel dataset detailing population movement, along with relevant metadata. Leveraged skills in data analysis and demographic studies to create a reproducible setup that supports future analytics and dashboard development. The repository’s clear organization and data-model scaffolding facilitate rapid onboarding for new contributors and provide a scalable base for data-driven decision making. No critical bugs were encountered during the bootstrap phase, and all planned features were delivered within the initial month.