This book examines the security dialogue between Japan and the EU starting with the establishment of the European Community-Japan cooperation in the late 1950s and continuing until today. It is a study of International Relations and International Relations history. It is both analytical and empirical research that applies constructivist approaches (-systemic school by Ernst B. Haas) in International Relations. The significance of this study stems from the argument that security dialogue between the EU and Japan takes place, and what is more, it is expanding, adding new areas to the dialogue. Thus, it provides an advanced discussion of security. Inasmuch as most scholarly works dealing with Europe-Japan relations focus more on economic and trade rather than political and security issues, this book is innovative and based both on an historical and problematic approach. It provides a base for further discussion on the Japan-European Union cooperation in the security sphere.