Ryohei Mogi

Ryohei Mogi is a demographer who bridges scientific research with real-world action.
My mission is to turn evidence into action to tackle low fertility, through research and collaboration with policymakers, the media, and both public and private sectors.**

Background

I received my Ph.D. in Demography from the Centre for Demographic Studies, Universitat Autònoma de Barcelona.
I then worked as a Research Fellow at the Department of Sociology, University of Oxford, and as an Assistant Professor at the Interdisciplinary Centre on Population Dynamics, University of Southern Denmark.
I am currently based at Pompeu Fabra University in Barcelona.

My expertise lies in comparative demographic research, analysing fertility and family change.

How I work with partners

Alongside academic research, I actively engage with policymakers, media, and the public and private sectors.
Here are the main ways I collaborate:

• Advisory & consulting: Supporting policymakers and organisations with evidence-based guidance. This includes survey design, analysis of fertility and marriage trends, and the creation of data dashboards
• Public speaking & lectures: Keynotes, seminars, and talks on fertility and population issues
• Writing & media: Articles, commentary, and fact-checking for newspapers, magazines, and international media outlets

Selected Media Coverage

• Todo por hacer. Radio 5, rtve. 30/09/2025. (In Spanish)
• What superstition tells us about humanity. Financial Times. 25/09/2025. (In English)
• New mothers are getting older - but in East Jutland there is still a preponderance of teenage mothers. TV2 Østjylland. 05/04/2023. (In Danish)
• Over-45s in Denmark giving birth more than teens. The Copenhagen Post. 04/04/2023. (In English)
• Fertility is now a global challenge - report exposes one important truth. Nyheder TV2. 04/04/2023. (In Danish)
• Two numbers say a lot about how we have children today: Fertility expert calls it both a “triumph and an accident”. Berlingske. 03/04/2023. (In Danish)

Contact

📩 ryohei.mogi[at]upf.edu

Please feel free to get in touch for speaking engagements, advisory work, or media commentary.

My 4 missions as a demographer

Follow me

• Medium: I write articles on low fertility for lay audience.
• LinkedIn
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