Ryohei Mogi | Demographer

portrait

Ryohei Mogi

Ph.D. in Demography

Pompeu Fabra University, Department of Political and Social Science (Spain)

I am a demographer who bridge 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


Invited Talks (Selected)

  • 06/03/2024. Challenges of dataviz and the reactions from the internet audience to our study. RAS seminar, Office for National Statistics, the UK.

At universities: Universidad Nacional de Educación a Distancia (Spain), Charles University (Czechia), London School of Hygiene and Tropical Medicine, Princeton University, Macquarie University (Australia)

Media Appearances & Interviews (Selected) Selected media coverage


Please feel free to get in touch for any inquiries.
📩 ryohei.mogi[at]upf.edu


My 4 missions as a demographer

my mission


Follow me

Blog posts on low fertility and demographic change, written for a broad audience and for policy insights



news

Sep 30, 2025 New media interview Todo por hacer in Radio 5, rtve.
Sep 25, 2025 New media article What superstition tells us about humanity in Financial Times.
Aug 5, 2025 New publication Exposure to non-partnership and fertility desires among childless population in Japan in Social Forces.
Sep 10, 2024 New publication Lowest low fertility in Spain: Insights from the 2018 Spanish Fertility Survey in Demographic Research.
Jun 7, 2024 New publication Employment conditions and non-coresidential partnership in very-low fertility countries: Italy and Japan in Journal of Family Research.