1. Objectives As information and communication technology has become more widespread and advanced, and as its use and application has evolved, information communication now provides for a basis for all social, economic and cultural activities. Cyberspace, which arose from advancements in information and communication technology, has become an essential platform to support national growth. On the other hand, with our heightened reliance on information and communication technology, increasingly complex and sophisticated cyber-attack techniques and expansion of cyber attack targets, the degree of cyber threats have become more and more serious. For example, incidents that would paralyze administrative and social functions in the real world represent a real threat. Cyberspace has continued to expand beyond national borders, and its use and application by various entities have grown rapidly. Consequently, associated risks are becoming more severe, widespread and globalized. Now, cyber threats emerge as urgent global challenge facing the international community as a whole. In order for countries in the world to coexist in cyberspace and share its benefit to a maximum extent, it is essential to acknowledge different values, build mutual trust and work hand-in-hand to counteract the challenges. To this end, Japan is strongly committed to actively strengthen cooperation and mutual assistance internationally so as to ensure safe and reliable cyberspace. Japan boasts the world’s highest level of telecommunications infrastructure. The increased use and application of information and communication technology means Japan has already faced a variety of cyber threats. In this context, the Japanese government successively prepared and revised strategies, annual plans, sector-specific policies and other measures in pursuit of ensuring cybersecurity, and, based on these strategies and measures, forged cooperation among industry, academia and government stakeholders in addressing these challenges. Japan is dedicated to utilize these extensive experience and knowledge in promoting international cooperation. This Strategy is based on the Japan Revitalization Strategy and the Cybersecurity Strategy which were developed in June 2013, and summarizes Japan’s basic policy and its priority areas for international cooperation and mutual assistance in the field of cybersecurity, so that it can be presented as a package to the stakeholders both in Japan and overseas. Japan will promote initiatives for international cooperation and mutual assistance in cybersecurity based on this Strategy under the common understanding shared among all domestic stakeholders including those from industries, academia and the government. Japan will actively contribute to shaping of safe and reliable cyberspace in which free flow of information is ensured by building relationships of cooperation with countries around the world. 1