Andrew L. Oros is a Senior Fellow and the Director of the Japan Program at the Stimson Center.

His areas of expertise include Japanese domestic politics, Japan’s foreign relations, East Asian security, and the intersection of demographic change and national security readiness. He is the author of four books and numerous articles and book chapters on issues related to Japanese politics and foreign policy, East Asian security, the changing nature of military security, and changing demographics in the Indo-Pacific and beyond. His latest book, Asia’s Aging Security (2025), examines how demographic change – such as shrinking populations, aging societies, and gender imbalances – have and will affect the security environment in the Indo-Pacific region and, in particular, the network of U.S. alliances and partnerships in the region. He conducted research for his previous book, Japan’s Security Renaissance (2017), as an invited research fellow at Japan’s National Institute of Defense Studies and as a Japan Foundation Abe fellow at Keio University in Tokyo and Peking University in Beijing. His research and foreign policy insights are featured regularly in the media in the U.S., Japan, and worldwide.