The purpose of this book is to examine the security-related aspects behind Japan's emerging internationalism. Japan has for some time been projecting a higher international profile, which the Diet's approval to allow Japanese armed forces to operate abroad is but one manifestation. The book's scope is not limited to military issues; it embraces a spectrum of security-related topics such as constitutional amendment, international re-alignment and cooperation, defence industrialisation, Japan-US relations and technology leakage, and Japan's role in the new international order.