Population of the Empire of Japan. Population of Japan proper (Estimates) (1920-1939) : Statistical Yearbook of Imperial Japan 59 (1940) Table 3B

PERIOD: 1920-1939. NOTE: (As of October 1st but as of September 1st in 1923)The population estimates were obtained as follows: (1) For 1921 to 1923, the population estimate is the sum of county- and city-level population estimates obtained by multiplying the de facto population in the Population Census conducted on October 1, 1920, with the average annual population growth rate by gender from 1908 to 1918. (2) For 1924, the difference between the population of Japan overall calculated using the population growth rate by sex in each city and summing up the results and the population overall calculated using the population growth rate by sex for Japan overall was proportionally subtracted from the population of each prefecture; moreover, the population decrease due to the Great Kanto Earthquake on September 1, 1923 was also taken into account. (3) For Taisho 1926 to 1929, the de facto population in the 1920 and 1925 Population Censuses is used to obtain the annual average geometric growth rate of Japan's population overall, which is then used to estimate the population. (4) For 1931 to 1934, the same procedure is employed using the de facto population in the 1920 and 1930 Population Censuses. (5) From 1926 onward, the population estimates are obtained by adding the increase in the difference between births and deaths up to each estimation year in the 1935 Population Census using the results of the Vital Statistics survey. SOURCE: [Survey by the Statistics Bureau, Imperial Cabinet].

时期：1920-1939。备注：（截至1923年9月1日，但截至1923年10月1日）人口估计的获取方式如下：（1）对于1921年至1923年，人口估计为实际人口普查于1920年10月1日进行的10月1日实际人口与1908年至1918年性别平均年度人口增长率相乘所得的县和城市级别人口估计之和。（2）对于1924年，通过使用每个城市的性别人口增长率计算日本总体人口，并将结果相加得到的总体人口与使用日本总体性别人口增长率计算得到的总体人口之间的差异按比例从每个府的人口中扣除；此外，还考虑了1923年9月1日的大关东地震引起的人口减少。（3）对于大正时期的1926年至1929年，使用1920年和1925年人口普查的实际人口以获得日本总体人口的年度平均几何增长率，然后用于估计人口。（4）对于1931年至1934年，采用与上述相同的程序，使用1920年和1930年人口普查的实际人口。（5）从1926年开始，通过将1935年人口普查中至估算年份为止的出生与死亡差异的增加与生命统计调查的结果相结合来获得人口估计。来源：[帝国内阁统计局调查]