This book collects the scientific proceedings presented during the 5th International Civil Engineering and Architecture Conference held in Tokyo, Japan, in March 2025 with the aim to share cutting-edge research, innovative practices, and visionary ideas shaping the future of our built environment. The book is organized into following main parts: (1) Innovative materials and technologies in civil engineering; (2 ) sustainable architecture and urban planning; (3) infrastructure and transportation systems; (4) geotechnical and structural engineering; (5) building performance and energy efficiency; (6) disaster resilience and risk management; (7) construction management and project delivery; and (8) case studies and best practices in civil engineering and architecture. The proceedings serve as a valuable resource for academics, practitioners, policymakers, and students alike, providing insights into the latest trends and best practices in civil engineering and architecture.