Author(s) Shin Haeng Lee and King-wa Fu Keywords Asian Internet, unconventional political participation, opportunity structures, comparative research, cross-national survey Abstract This study examines the association between Internet use and protest politics in South Korea and Taiwan, using secondary data from the sixth wave (2010–14) of the World Values Survey. The data show that Internet use is positively associated with low-cost protest acts, like signing a petition. Internet use is also correlated with the willingness to consider higher-cost actions such as attending demonstrations and joining in boycotts. But it does not appear to consistently increase actual protests of this sort. Discussion is made to address comparable opportunity structures for protest politics in the two East Asian democracies, where the Internet is deeply integrated into the country’s political landscape. Author(s) Bio Shin Haeng Lee (corresponding author: shinlee@sejong.ac.kr) is an Assistant Professor in the Division of International Studies at Sejong University, Seoul. His research examines socio-political implications of digital media and big data using quantitative and computational social scientific methods. He earned his Ph.D. in communication at the University of Washington. His recent research has been published in peer-reviewed journals, including Journal of Asiatic Studies, Journal of Information Technology and Politics, and First Monday. King-wa Fu is an Associate Professor at the Journalism and Media Studies Centre (JMSC), The University of Hong Kong. His research interests cover political participation and media use, computational media studies, health and the media, and younger generation’s Internet use. He is a visiting Associate Professor at the MIT Media Lab and Fulbright-RGC Hong Kong Senior Research Scholar in 2016?2017. He has a Ph. D. from the JMSC. DOI: https://doi.org/10.1017/jea.2018.25