Hi, welcome to my website. I am Ryutaro Mori, studying collective intelligence from economic and cognitive perspectives.

Current Position

Postdoc at RIKEN (SPDR for RIKEN CBS Computational Group Dynamics Collaboration Unit)
JST ACT-X “Innovations in Mathematical and Information Sciences for Building Next-Generation AI”
Email: ryutau.mori [at] gmail.com

Education

2023.4 - 2026.3:
PhD (Major: Social Psychology; Minor: Information Science), Department of Social Psychology, The University of Tokyo
2023.4 - 2026.3:
JSPS Research Fellow (DC1), Japan Society for the Promotion of Science (JSPS)
2021.4 - 2023.3:
MA (Social Psychology), Department of Social Psychology, The University of Tokyo
2018.10 - 2021.3:
BA (Engineering), Faculty of Engineering, The University of Tokyo
2016.4 - 2018.9: Human Sciences I, The University of Tokyo

Research Interests

I am interested in collective intelligence in a broad sense, with a particular focus on human collective dynamics. I aim to understand how individual-level behaviors or computations translate into the collective-level (dis-)functions. Currently, I use a combination of game-theoretic experiments, computational modeling, and multi-agent simulations.

Publications

[in English]

Mori, R., Hanaki, N., & Kameda, T. (2024). An outside individual option increases optimism and facilitates collaboration when groups form flexibly. Nat. Commun. 15, 5520.
Mori, R., Suganuma, H., & Kameda, T. (2024). Generalizability of Conformist Social Influence Beyond Direct Reference. Proceedings of the Annual Meeting of the Cognitive Science Society, 46.
Mori, R., Liu, R., and Chen, Y. (2021). Measuring the Topological Time Irreversibility of Time Series With the Degree-Vector-Based Visibility Graph Method. Front. Phys., 9:777958. doi: 10.3389/fphy.2021.777958

[in Japanese]

Mori, R., Harada, K., Mizuno, S., Onishi, N., Horiguchi, I., Sakamoto, K., Horibe, K., Kojima, T., Matsuo, Y., & Iwasawa, Y. (2026). Replicating Systems, Understanding Mechanisms: A Survey on Social Simulation with Large Language Model Agents. Journal of the Japanese Society for Artificial Intelligence, 41(4). JSAI Anniversary Best Paper Award. (in Japanese)
Kameda, T. & Mori, R. (2022). Socio-biological bases of distributive justice. Journal of the Robotics Society of Japan, 40(2), 25-28. doi:10.7210/jrsj.40.25 (in Japanese)

Talks & Posters

English

International Conference on Social Dilemmas 2026, Shimonoseki, Japan (2026).
Machine+Behavior Conference, Berlin, Germany (2026).
12th Symposium on The Biology of Decision Making, Lyon, France (2025).
Proceedings of the Annual Meeting of the Cognitive Science Society, 46, Rotterdam, NDL (2024; Poster).
International Conference on Social Dilemmas 2024, Leiden, NDL (2024).

Japanese

66th Conference of the Japanese Society of Social Psychology, Tokyo, JPN (2025).
88th Annual Convention of the Japanese Psychological Association, Kumamoto, JPN (2024).
65th Conference of the Japanese Society of Social Psychology, Tokyo, JPN (2024).
69th Conference of the Japanese Group Dynamics Association, Kochi, JPN (2023). Best Presentation Award.
64th Conference of the Japanese Society of Social Psychology, Tokyo, JPN (2023).
15th Conference of Human Behavior & Evolution Society of Japan, Sapporo, JPN (2022).
63rd Conference of the Japanese Society of Social Psychology, Kyoto, JPN (2022).
24th Annual Conference of Experimental Social Science, Online, JPN (2022). Young Researchers' Award.
14th Conference of Human Behavior & Evolution Society of Japan, Online, JPN (2021).
62nd Conference of the Japanese Society of Social Psychology, Online, JPN (2021).

Coauthored

Horiguchi, I., & Mori, R. (2026). Comparing Cooperative Behavior of Large Language Models and Humans in Voluntary Participation Public Goods Games. Behavioral Clones Workshop 2026, Berlin, Germany (reviewed).
Horiguchi, I., Mori, R., Harada, K., Takada, R., Kojima, T., Iwasawa, Y., & Matsuo, Y. (2026). Comparing cooperative behavior of large language models and humans in voluntary participation public goods games. JSAI 2026.
Ohtsubo, K., & Mori, R. (2025). Usefulness of "hump-shaped" strategies in creating diverse public goods. 66th Conference of the Japanese Society of Social Psychology.
Sumida, R., Suganuma, H., Mori, R., & Muramoto, Y. (2025). Effects of regret on option search: Simulation and experimental tests. 66th Conference of the Japanese Society of Social Psychology, Tokyo, Japan.
Suganuma, H., Sumida, R., & Mori, R. (2025). Cognitive mechanisms determining the number of options: Simulation and behavioral experimental tests. 42nd Annual Meeting of the Japanese Cognitive Science Society.
Suganuma, H., Sumida, R., & Mori, R. (2024). Formal modeling of choice overload. 88th Annual Convention of the Japanese Psychological Association.
Kim, H., Mori, R., Mercier, H., & Kameda, T. (2023). Can social information reduce bias based on political prejudice? 87th Annual Convention of the Japanese Psychological Association. Outstanding Presentation Award.
Kim, H., Mori, R., Mercier, H., & Kameda, T. (2022). Can social information reduce bias based on political prejudice? 15th Conference of Human Behavior & Evolution Society of Japan. Young Presentation Award.

Others

I like to read random interesting papers or textbooks with my friends. Here is a partial list that I think describes my current interests well.

Accounts

Github: ryutau
Google scholar: Ryutaro Mori
Qiita: ryutaro mori
Researchmap: Ryutaro Mori
ORCID: Ryutaro Mori

Kanji

森　隆太郎 (もり　りゅうたろう)