Tomoko Matsunaga (born 1985) is a Japanese media historian and Associate Professor in the Faculty of Communication Studies at Tokyo Keizai University. She received her Ph.D. in Education from Kyoto University and specializes in media history, journalism, and the relationship between politics and communication in modern Japan. Her research explores the development of the public sphere, magazine culture, and the historical role of the media. Her book The Revolution of Itaru Yonehara: Unfaithful Politics or a Faithful Media? received the 47th Suntory Prize for Social Sciences and Humanities (Society and Customs Division) in 2025.