East Asia is normally identified as a group of countries lying along the western edge of the Pacific Ocean, but in recent years scholars have begun thinking about a new East Asia that is a community rather than a set of sovereign states. This regional community is a theoretical notion variously defined on the basis of economic or political relations, philosophical orientations, language or other criteria, with each standard producing a different set of boundaries. This book looks at the new East Asia from a Northeast Asian perspective, considering it both as a theoretical construct and a practical reality.The authors are Asian Studies specialists, mainly from Japan but with contributions from Korea and the United States, and they consider the trade and economic interaction, diplomacy, and security arrangements of East Asia. Prepared as part of a five-year research program conducted by Waseda University's 21st Century Center of Excellence for the Creation of Contemporary Asian Studies, the essays are published here in English for the first time.