This paper aims to measure agenda-setting effects of Japanese Newspapers on public opinion. The rise of the internet and social media caused a controversy over the influence of traditional news media on public opinion. Some researchers argue that social media reduced the influence of traditional news media, such as TV and newspaper, on the people. Other researchers argue, however, that TV and newspaper remain crucial to public opinion formation. This paper analyzes a panel survey which was conducted on frequent internet user to figure out agenda-setting effects of Japanese newspapers. The results suggest that Japanese newspapers still exert agenda-setting effects on public opinion. On the other hand, the results also show that watching TV news and using internet weaken the influence of newspapers on public opinion.