The Summary of Regional Population Projections for Japan (2020-2050)

This article introduces the "Regional Population Projections for Japan (2023 Projection)" published by the National Institute of Population and Social Security Research in December 2023. Based on the 2020 census, it projects future population by prefecture and municipality through 2050. The projection shows that total population will begin declining in all prefectures from 2025, with Tokyo at 96.9% and Akita at 58.7% of 2020 levels by 2050. Analysis of population decline factors reveals natural decrease as the primary driver, though social increase mitigates decline in the Tokyo area and Aichi Prefecture. Future challenges include addressing the rapid increase in foreign population.