This book analyses the evolution of competition and shifts in user behaviour over the past quarter-century, since 2000, within Japan’s network media market from an economic perspective. It focuses on Japan’s distinctive media market, characterised by the traditionally high market share of terrestrial advertising broadcasts and public service broadcasting, and conducts a step-by-step empirical analysis over time based on a wealth of data—a feature that is unique. Furthermore, by analysing not only the platforms but also viewer behaviour on the demand side, and by examining the state of digitalisation and internet distribution, the study offers a comprehensive analysis. Additionally, by focusing on bias in the newspaper market—where political impartiality is not mandated by law—and exploring the possibility of skewed reporting frequency and volume rather than content itself, the book makes a novel contribution. It thus serves as a scholarly work that offers valuable insights for future institutional design in the media market.

Norihiro Kasuga is a Professor of Business Economics at Faculty of Economics, Toyo University, Bunkyo, Japan. After serving at the Ministry of Internal Affairs and Communications, he has been researching mainly market power in boradcasting industry, interaction between media and stock marke,financial asset choice behavior and received Research Award for Excellence in Research form The Foundation for Kampo Insurance & Culture (2006), Nextcom Information and Communication Paper Award from KDDI Research Institute (2012). He has may research experience in foreign institutions including Yale Center for International Area Studies, Curtin Business School and Stockholm School of Economis. He has also contributed to numerous public committees such as Cabinet Office, Fair Trade Commission and the  Japan Commercial Broadcasters association.

Manabu Shishikura is a Professor at the Faculty of Economics, Nagasaki University. He received his Master's degree from Waseda University and his PhD from Keio University. Before starting his academic career, he worked at the Ministry of Internal Affairs and Communications, Japan, for 11 years. He became an Associate Professor at the Faculty of Economics, Nagasaki University in 2012, a Professor in 2014, and has been serving as the Dean of the Faculty since 2023. At Nagasaki University, he teaches courses on public economics and the Japanese economy. He also serves as a Special Research Fellow at the Institute for Information and Communications Policy, Ministry of Internal Affairs and Communications, Japan. His main research areas include corporate strategies and market characteristics in media and network industries, as well as social welfare in mixed oligopolistic markets where the public and private sectors coexist.

Akio Torii is a researcher at the Institute of Economic Research, Chuo University, Hachiouji, Japan, and Professor Emeritus at both Chuo University and Yokohama National University, Yokohama, Japan. His extensive work includes authoring and co-editing in the fields of Industrial Organization, both Theory and Empirical, with a focus on productivity/efficiency analysis in manufacturing, energy sector analysis, utility regulation, retail/wholesale distribution sectors, logistic industries, non-life insurance industries, and dynamic macro-distribution theories. Notable recognitions include the Best Paper Award from the European Media Management Association (2016) and the Japan Society of Marketing and Distribution (2007). He has also contributed to numerous research committees for public organizations like the Ministry of Internal Affairs and Communications, Ministry of Economy, Trade and Industry, the Japan Fair Trade Commission, and Central Research Institute of Electric Power Industry beside many other institutions.