Evolution of Public Opinion on COVID-19 Vaccination in Japan: Large-Scale Twitter Data Analysis

Ryota Kobayashi   ^{1, 2, 3 *} , PhD ;   Yuka Takedomi   ^{4 *} , MA ;   Yuri Nakayama   ^{1 *} , BSc ;   Towa Suda   ^{4 *} , MA ;   Takeaki Uno   ⁴ , PhD ;   Takako Hashimoto   ⁵ , PhD ;   Masashi Toyoda   ⁶ , PhD ;   Naoki Yoshinaga   ⁶ , PhD ;   Masaru Kitsuregawa   ^{6, 7} , PhD ;   Luis E C Rocha   ^{8, 9} , PhD

¹ Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa, Japan

² Mathematics and Informatics Center, The University of Tokyo, Tokyo, Japan

³ PRESTO, Japan Science and Technology Agency, Kawaguchi, Japan

⁴ Principles of Informatics Research Division, National Institute of Informatics, Tokyo, Japan

⁵ Faculty of Commerce and Economics, Chiba University of Commerce, Ichikawa, Japan

⁶ Institute of Industrial Science, The University of Tokyo, Tokyo, Japan

⁷ National Institute of Informatics, Tokyo, Japan

⁸ Department of Economics, Ghent University, Ghent, Belgium

⁹ Department of Physics and Astronomy, Ghent University, Ghent, Belgium

*these authors contributed equally