Coastline and Area (As of Oct. 1, 1932) : Statistical Yearbook of Imperial Japan 51 (1932) Table 2

PERIOD: The area of Japan proper is based on the survey on October 1, 1932. The areas of Korea, South Sakhalin, Kwantung Province and South Pacific Mandate are at the end of 1930. The Area of Taiwan, at the end of 1931. SOURCE: [Surveys by the Hydrographic Department and the Land Survey Department; Statistics by government offices, overseas territories of Japan].

时期：本数据集的日本本土区域数据基于1932年10月1日的调查。朝鲜、南萨哈林、关东省及南太平洋委任地的数据截至1930年底。台湾地区数据截至1931年底。来源：[日本海图部与土地测量部的调查；政府办公室及日本海外领土的统计数据]。