Ryohei Mogi is a Postdoctoral Fellow in Sociology and Social Demography at the Department of Sociology and the Leverhulme Centre for Demographic Science.

He received his PhD in Demography at the Autonomous University of Barcelona and Centre for Demographic Studies in 2020 and European Research Certificate in Demography from the European Doctoral School of Demography at Max Planck Institute for Demographic Research and La Sapienza University of Rome.

He is a demographer and seeks to understand the fertility decline and family change by developing alternative measures and analysing the key factors of such decline and change and its consequences. He particularly focuses on childlessness, mate search, and partnership formation.