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Skip to Content Japanese English Chinese About RIETI Site Map Help Contact Discussion Papers Search Site Search Menu Research Areas Research Programs (FY2024-2028) Research Programs (FY2020-2023) Research Programs (FY2016-2019) Research Programs (FY2011-2015) Policy Research Domains (FY2006-2010) Projects Survey Fellows According to Title Alphabetical order RIETI Alumni Research/Policy Papers Discussion Papers (English) Discussion Papers (Japanese) Policy Discussion Papers (English) Policy Discussion Papers (Japanese) Technical Papers (English) Technical Papers (Japanese) Non Technical Summaries List of Articles in Journals Research Digest Discussion Papers Search Publications RIETI Books (English) RIETI Books (Japanese) History of Japan's Trade and Industry Policy Authors' Words Other Publications (English) Other Publications (Japanese) Events Symposiums Workshops BBL Seminars Archived Seminar Series Data JIP Database R-JIP Database CIP Database Industry-Specific Nominal and Real Effective Exchange Rates AMU and AMU Deviation Indicators JSTAR RIETI-TID RIETI FDI Database ICPA Project Links Articles Column Special Series Newspapers & Magazines Fellows' Works VoxEU Column From IZA Perspectives from Around the World Other Contents RIETI Report Policy Update Keizai Sangyo Journal (METI Journal) Research Areas Fellows Research/Policy Papers Publications Events Data Articles Site Map Technical Issues Coontact Discussion Papers Search Close HomeResearch/Policy PapersDiscussion Papers (English)FY2023 The Rise and Fall of Cities under Declining Population and Diminishing Distance Frictions: The case of Japan Print Author Name MORI Tomoya (Faculty Fellow, RIETI) / MURAKAMI Daisuke (Institute of Statistical Mathematics) 　　　　 Creation Date/NO. February 2024 24-E-028 Research Project Development of Quantitative Framework for Regional Economy Based on the Theory of Economic Agglomeration Download / Links Download paper [PDF:68MB] 　　　　 Abstract Many countries are expected to face rapidly declining and aging populations. Meanwhile, urbanization continues worldwide, preserving the power law for city size distribution at the country level. We have developed a spatial statistical model based on the theory of economic agglomeration to predict the future geographic distribution of the population at the 1 km grid level. The model considers growth factors for cities and grids, while maintaining the power law for city size distribution at the country level. Japan is an ideal case study of a shrinking economy. It highlights the challenges that the rest of Asia and the world are likely to face. Cities in aging regions will decline more rapidly, shifting the center of gravity of the country's population distribution. Smaller cities are more vulnerable to population decline, but with declining transportation and communication costs, even large cities are not immune to elimination. The future urban economy will revolve around fewer and more distant larger cities. 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