This book explores the transformation of the Japanese state in response to the challenges of governance by focusing on two case studies: ICT regulation and antimonopoly regulation after the 1980s, which experienced a disjuncture and significant transformation within the period with approaches embracing competition. In so doing, it reveals the transformation of the state and governance in a Japanese context and presents itself as an example of the new governance school addressing the state, its transformation, and the governance of the political arena in Japanese politics and beyond, setting out a challenge to the established body of pluralist and rational choice literature in Japanese politics. With its comprehensive review and analysis of the theory and development of Japan’s contemporary politics, this book is suitable as a textbook for undergraduate and postgraduate courses as well as a guidebook for practitioners engaging in policies and businesses relating to Japan.