1889092375@g.ecc.u-tokyo.ac.jp
Last Update: 2026/7/2
I have demonstrated a cross-temporal decline in extraversion among the Japanese population in recent years.
I am investigating whether individual differences (idiosyncrasies) emerge in spontaneous interpersonal perception.
Department of Psychology, College of Education, Psychology and Human Studies, Aoyama Gakuin University
Advisor: Associate Professor Yuji Ogihara
Graduate School of Humanities and Sociology, The University of Tokyo
Advisor: Associate Professor Atsunobu Suzuki
Akimoto, R., & Ogihara, Y. (2026). Decline of extraversion in Japan: A cross-temporal meta-analysis. Personality Science, 7, 1–12. https://doi.org/10.1177/27000710261452522
Akimoto, R., & Ogihara, Y. (2025, August). Behavioral indicators reflecting regional-level extraversion: An investigation at national and prefectural levels. [Oral presentation]. The 71st Annual Convention of the Japanese Society of Group Dynamics, Hirosaki University.
Akimoto, R., & Ogihara, Y. (2025, September). Extraversion in Japan is declining: A cross-temporal meta-analysis (2010–2021). [Poster presentation]. The 89th Annual Convention of the Japanese Psychological Association, Tohoku Gakuin University. Excellent Presentation Award
Akimoto, R., & Ogihara, Y. (2025, September). Temporal changes in extraversion in Japan: A gender-specific analysis. [Oral presentation]. The 66th Annual Convention of the Japanese Society of Social Psychology, The University of Tokyo.
Akimoto, R., & Ogihara, Y. (2025, October). Behavioral indicators also show a decline in extraversion among the Japanese population. [Poster presentation]. The 34th Annual Convention of the Japanese Personality Psychology Association, Shinshu University.
Akimoto, R., & Suzuki, A. (2025, December). Is trustworthiness evaluation of faces idiosyncratic even in automatic processing? [Poster presentation]. Mebuku Hana Saku Jinbungaku in Library Plaza 2025, The University of Tokyo.
The 89th Annual Convention of the Japanese Psychological Association Excellent Presentation Award (2025)(for presentation #2 above). Aoyama univ's HP
Social Activities
Website
Nazology: Study reveals a decline in the "extraversion" of Japanese people (2026.07.07) nazology.kusuguru.co.jp/archives/197272