Worked on the jami-fhir-jp-wg/jp-core-v1x repository to address a critical bug affecting JP Organization resource data accuracy. Focused on refining FHIR data modeling by correcting the address representation in JP_Organization_Example.fsh, ensuring that address.text captured the full address while address.line was reserved for the street component. This adjustment improved both data quality and downstream UI rendering. Additionally, removed an unnecessary search parameter to streamline query performance and reduce maintenance overhead. Demonstrated proficiency in FSH and FHIR, with careful attention to Japanese localization requirements and clear, traceable commit practices throughout the month’s engineering work.