The Kagawa Prefectural Government Building East Wing is a significant example of seismic retrofitting in contemporary Japanese architecture. Completed in 2019, this office structure represents a thoughtful approach to preserving and strengthening an important civic building. Located in Takamatsu, the project involved collaboration between renowned architectural firms Tange Urban Design and Architecture, Obayashi Corporation, and Matsuda Hirata Design. The retrofitting work demonstrates how modern engineering solutions can be integrated into existing structures while maintaining their functional and aesthetic integrity. This project showcases the balance between architectural heritage preservation and contemporary safety standards in government facilities.