This 2-volume book highlights cutting-edge ecodesign research and covers broad areas ranging from individual product and service design to social system design. It includes business and policy design, circular production, life cycle design and management, digitalization for sustainable manufacturing, user behavior and health, ecodesign of social infrastructure, sustainability education, sustainability indicators, and energy system design. Featuring selected papers presented at EcoDesign 2021: 12th International Symposium on Environmentally Conscious Design and Inverse Manufacturing, it also includes diverse, interdisciplinary approaches to foster ecodesign research and activities.  In the context of Sustainable Development Goals (SDGs), in particular SDG 12 (Responsible Consumption and Production), it addresses design innovations for sustainable value creation, considering technological developments, legislation, and consumer lifestyles. Further, the book discusses the conceptof circular economy, which aims to develop circular business models for resource efficient society by taking advantage of digital technologies including artificial intelligence, internet of things, digital twin, data analysis and simulation. Written by experts from academia and industry, Volume 1 highlights sustainable design such as product and process design, collaborative design, sustainable innovation, digital technologies, design methodology for sustainability, and energy system design. The methods, tools, and practices described are useful for readers to facilitate value creation for sustainability.