Book excerpt: This book offers careful glimpse from the lenses of selected case studies of major counties in East Asia, namely China and Japan to obtain insights as well as lessons regarding their perspective sustainable cities development. Urban sustainability is the pillar domain for achieving overall sustainability. East Asia has the world most populous countries and cities; therefore, it is of great importance to understand, analyze, and assess the sustainable urban development trends and paradigms in an East Asia setting so as to better guide the future development of sustainable cities in the region. The outcomes of this book are policy-relevant consultations to key stakeholders from various walks of sustainability studies.