With increased competition among business groups, companies need to enhance the value of their business and effectively manage individual firms. This book explores and elucidates business group and inter-firm management in Japanese environments, both theoretically and practically through case studies, survey research and other methodologies. In considering the concept of the “Keiretsu” in Japan, as well as other management methods employed by Japanese companies, this book provides extensive coverage on uniquely Japanese management methods. Examples are the application of evaluation system, execution of M&A, utilization of segment information, management of inter-firm relations, and organizational learning. The analyses, hypotheses and conclusions presented in this book will be useful for business practitioners and scholars.