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Kenji Itao

@kenjiitao.bsky.social
100 followers 63 following 45 posts

Assistant Professor at Tohoku University, studying the mechanisms of social structure formation in human history through statistical physics and evolutionary approaches. kenjiitao.com/en

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Kenji Itao @kenjiitao.bsky.social · 04/10/2026
🚨 ACE Seminar We’re excited to host Dr. Ying Li in our upcoming ACE Seminar! 🗓 Tuesday, Oct 20, 2026 🕖 7:00 PM JST (UTC+9) 💻 Online via Zoom 🔗 To receive the Zoom link, please send a blank email to ace-seminar+subscribe@googlegroups.com
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Ruth Mace @ruthmace.bsky.social · 29/09/2026
Our Evolutionary Anthropology seminars start next Tuesday 6th with @kenjiitao.bsky.social on the evolution of kinship and demographic transition. NOTE new location: Engineering Bldg, Mallet Place (Room 1.20) 3.30-5pm followed by 🍷 in Anthropology. All welcome! www.ucl.ac.uk/social-histo...
ucl.ac.uk
Evolutionary Anthropology seminars
Exploring the evolutionary roots of human behaviour, biology, and culture through interdisciplinary research and debate.
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Kenji Itao @kenjiitao.bsky.social · 27/07/2026
Newsweek interviewed me about this study and its implications for falling birth rates worldwide. Read the article here: www.newsweek.com/study-of-237...
newsweek.com
Researchers analyzed two centuries of birth data—one trend stood out
Lead author of the study Kenji Itao told Newsweek what many governments may be overlooking about low birth rates.
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Kenji Itao @kenjiitao.bsky.social · 08/07/2026
Are there typical patterns in global fertility decline? In my new paper, I show that it can be largely described by just two pathways. This paper also proposes a mechanism behind two pathways, and a possible policy for fertility recovery: lowering education costs. www.cambridge.org/core/journal...
cambridge.org
Two universal pathways in demographic transition | Evolutionary Human Sciences | Cambridge Core
Two universal pathways in demographic transition - Volume 8
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Kenji Itao @kenjiitao.bsky.social · 04/07/2026
Thanks, Bret! This project began with a conversation we had.
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Bret Beheim @babeheim.bsky.social · 19/06/2026
Cool new paper by @kenjiitao.bsky.social on universal patterns in the demographic transition www.cambridge.org/core/journal...
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Kenji Itao @kenjiitao.bsky.social · 01/06/2026
🚨 ACE Seminar We’re excited to host Dr. Patrick Savage @patrickesavage.bsky.social in our upcoming ACE Seminar! 🗓 Tuesday, Jun 16, 2026 🕖 2:00 PM JST (UTC+9) 💻 Online via Zoom 🔗 To receive the Zoom link, please send a blank email to ace-seminar+subscribe@googlegroups.com
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Kenji Itao @kenjiitao.bsky.social · 06/03/2026
🚨 ACE Seminar We’re excited to host Dr. VPS Ritwika in our upcoming ACE Seminar! 🗓 Tuesday, Mar 17, 2026 🕖 7:00 PM JST (UTC+9) 💻 Online via Zoom 🔗 To receive the Zoom link, please send a blank email to ace-seminar+subscribe@googlegroups.com
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Kenji Itao @kenjiitao.bsky.social · 02/03/2026
From Apr 1, 2026, I’ll launch my own lab at Tohoku University as an Assistant Professor! I’m happy to host applicants for the JSPS International Postdoc Fellowships. If you’re interested in mathematical models of human history, feel free to DM me!
jsps.go.jp
About the Program (Standard)|Postdoctoral Fellowships for Research in Japan|Postdoctoral Fellowships for Research in Japan
Official Website of Japan Society for the Promotion of Science (JSPS)
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Kenji Itao @kenjiitao.bsky.social · 21/01/2026
🚨 ACE Seminar We’re excited to host Dr. Christopher Kavanagh in our upcoming ACE Seminar! 🗓 Tuesday, Jan 27, 2026 🕖 7:00 PM JST (UTC+9) 💻 Online via Zoom 🔗 To receive the Zoom link, please send a blank email to ace-seminar+subscribe@googlegroups.com
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Wataru Toyokawa @watarutoyokawa.bsky.social · 21/10/2025
【🚨ACE Seminar Alert🚨】We're excited to have Dr Quentin Atkinson at University of Auckland on Tuesday 18 Nov. at 7pm in Tokyo (6pm in Singapore/11am in Berlin)! You can sign up for the mailing list to get the zoom link by sending a blank email to ace-seminar+subscribe@googlegroups.com
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Kenji Itao @kenjiitao.bsky.social · 12/09/2025
🔔ACE Seminar: We’re thrilled to welcome Dr. Siyang Luo from Sun Yat-sen University! 🗓 Mon, Sep 22 at 7:00 PM JST (18:00 (Perth/Singapore/Beijing), 19:00 (Tokyo/Seoul), 20:00 (Sydney)) ✉️ To receive the Zoom link, send a blank email to: ace-seminar+subscribe@googlegroups.com
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Kenji Itao @kenjiitao.bsky.social · 31/07/2025
Our latest paper is on arXiv! How can robust collective resource governance emerge without costly individual monitoring? We theoretically demonstrate the self-organization of institutions relying only on monitoring of group-average resource use. 👉 arxiv.org/abs/2507.225...
arxiv.org
Anonymous monitoring enables turn-taking and sustainablity in collective resource governance: Multi-player evolutionary dynamical-systems game
Sustainable resource use in large societies requires social institutions that specify acceptable behavior and punish violators. Because mutual monitoring becomes prohibitively costly as populations gr...
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Wataru Toyokawa @watarutoyokawa.bsky.social · 01/07/2025
【🚨ACE Seminar Alert🚨】We're excited to have Dr Ryutaro @uchiyama.bsky.social joining from Singapore on Tuesday 29th July at 7pm in Tokyo (6pm in Singapore/12am in Berlin)! You can sign up for the mailing list to get the zoom link by sending a blank email to ace-seminar+subscribe@googlegroups.com
Title:
Motor–environment exploration in the human developmental niche

Absract:
In real behavioral ecologies, adaptive learning requires simultaneous exploration of both motor control and environmental task structure ("world model"), each presenting its own form of open-ended search complexity. We know much about each of these learning domains, but relatively little about their joint exploration space. I propose that this dual motor–environment exploration is crucial for understanding the human evolutionary niche. Human agency prolifically shapes environments that in turn shape our learning trajectories, presumably yielding a reciprocal (niche-constructive) feedback loop that couples mental structures to environmental structures and vice versa. Dual motor–environment exploration helps illuminate the explore–exploit landscape of this deeply collective, near-eusocial epigenetic milieu. It also offers unique computational and teleological perspectives on phenomena like cultural learning, social cognition, and behavioral creativity – complementing the population-level stochastic mechanisms proposed by cultural evolutionary theories.
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Wataru Toyokawa @watarutoyokawa.bsky.social · 09/05/2025
The 4th Asian Cultural Evolution Seminar is coming soon on 20 May! Sign up for the mailing list to get the zoom link, by sending a blank email to ace-seminar+subscribe@googlegroups.com
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Kenji Itao @kenjiitao.bsky.social · 13/04/2025
Excited to share our latest paper published in PNAS! We introduced a new theoretical framework, "evolutionary dynamical-systems game theory," to explain how rules for sustainable resource use self-organize. 🔗 www.pnas.org/doi/abs/10.1...
pnas.org
Self-organized institutions in evolutionary dynamical-systems games | PNAS
Social institutions are systems of shared norms and rules that regulate people’s behaviors, often emerging without external enforcement. They provi...
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Kenji Itao @kenjiitao.bsky.social · 13/04/2025
Excited to share our latest paper published in PNAS! We introduced a new theoretical framework, "evolutionary dynamical-systems game theory," to explain how rules for sustainable resource use self-organize. 🔗 www.pnas.org/doi/abs/10.1...
pnas.org
Self-organized institutions in evolutionary dynamical-systems games | PNAS
Social institutions are systems of shared norms and rules that regulate people’s behaviors, often emerging without external enforcement. They provi...
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