Japanese Approaches to International Law analyses historical developments, controversies, and future challenges regarding Japan's contribution to the making and implementation of international law. Each chapter discusses the Japanese government's positions on issues related to international law, relevant theories and concepts developed in Japanese academia, and leading domestic cases, laws, and policies, which have facilitated or hindered the effective implementation of international law in Japan. This book, based on domestic legal materials, policy documents, and academic literature, is a comprehensive handbook for readers to better understand Japanese approaches to international law.