After decades of solely relying on the United States for its national security needs, over the last decade, Japan has begun to actively develop and deepen its security ties with a growing number of countries and actors in the Asia-Pacific region and Europe, a development that has further intensified under the Shinzo Abe administration. This is the first book that provides a comprehensive analysis of the motives and objectives from both the Japanese and the partner-countries’ perspectives, and asks what this might mean for the security architecture in the Asia-Pacific region, and what lessons can be learned for security cooperation more broadly. This book is for those interested in Japan’s security policy beyond the US-Japan security alliance, and non-US centred bilateral and multilateral security cooperation. It is an ideal textbook for undergraduate and graduate level courses on regional security cooperation and strategic partnerships, and Japanese foreign and security policy.