Coastline and Area (As of Jun. 30, 1927) : Statistical Yearbook of Imperial Japan 48 (1929) Table 2

PERIOD: The area of Japan proper is as of June 30, 1929. The coastline and total areas of Korea, Taiwan, South Sakhalin, Kwantung Province, and South Pacific Mandate are as of October 1, 1926; the areas by region at the end of 1928. SOURCE: [Surveys by the Land Survey Department; Statistics by government offices, overseas territories of Japan].

时期：本州日本本土的面积截至1929年6月30日。韩国、台湾、南萨哈林、关东省及南太平洋委任地的海岸线及总面积截至1926年10月1日；各地区的面积截至1928年底。来源：[土地测量部门进行的调查；政府部门及日本海外领地的统计数据]。