The author summarizes the availability of Japanese official statistics concerning international migration. The paper is in three parts: the first describes the kinds of data available, the second analyzes changes in migration patterns before 1950, and the third deals with migration since 1950. The author notes that although the volume of international migration concerning Japan has historically been low, recent trends emphasize the need for better data.

[No Keywords available]

information processing Research Methodology economics population methodology demography Data Sources Research Design developing country Population Dynamics Developing Countries Asia health service Needs Developed Countries measurement Time Factors Far East Eastern Asia Health Services Needs and Demand Japan reliability reproducibility Reproducibility of Results Article migration international migration developed country population and population related phenomena Demographic Factors research Emigration and Immigration Economic Factors Population Characteristics population statistics Data Collection time English Abstract