Decades of propaganda have made students in the Western world so familiar with the Japanese interpretation of the population problem of Japan that even international commissions considered population pressure as an extenuating factor in the successive acts of military aggression by which Japan acquired hegemony over Formosa, Korea, and Manchuria. Few realized that the population pressure within Japan was minimal in comparison with that which already existed in the conquered areas; that, furthermore, Japanese imperial policy tended toward an increasing imbalance between population increase and employment opportunities. The deepening poverty of the Korean masses was often reported, only to be challenged by the citation of production statistics, but the provincialism of the West was such that discussion remained in the realm of charge and countercharge. Few students dared the linguistic hurdles barring factual analysis of the impact of Japanese political, economic, and educational domination on the traditional Korean patterns of fertility, mortality and migration. Whatever the explanation for this myopia of the social scientists of the interwar decades, its conquences were serious. No backlog of technically competent and conceptually mature research on the demography of Korea exists to guide either the analysis of the present or the assessment of the future.