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Population Census

1. Total Population

Based on the 2005 Population Census, the total population was 127,767,994. 62,348,977 were males (48.8%) and 65,419,017 were females (51.2%).

- Based on the 2005 Population Census, total population as of October 1, 2005 was 127,767,994 , increased 842,151, or 0.7%, compared with 2000. The increase rate had been on the decrease since 1980, then in the past five years, it dropped to its lowest point since the survey started. (Fig. 1)
- By sex, 62,348,977 were males and 65,419,017 were females. The male population was 3,070,040 less than the female population. Moreover, the sex ratio (males per 100 females) was 95.3, a drop of 0.5 percentage points from 2000.
- The population of Japan accounted for 2.0% of the world population of 6,460 million. It was tenth largest after China (1,320 million), India (1,100 million) and the U.S.A. (300 million). (Table 1)
- Population density was 343 persons/km2. Among the countries with a population of 10,000,000 or more, it ranked fourth after Bangladesh (985 persons/km2), Republic of Korea (480 persons/km2) and the Netherlands (392 persons/km2) . (Table 2)

Figure 1 Changes in the Population and Increase Rate (1920-2005)  

Table1 Population of Top 12 Countries of the World -2005 & Table2 Population Density of Top 12 Countries of the World -2005 

The population had decreased by 22,000 compared with population estimates from one year ago, indicating that it had been entering decrease phase.

- The population was 127.768 million according to the 2005 Population Census. It was 22,000 less than the estimated population of 127,790 million (after intercensal adjustment) as of October 1, 2004. It was the first time that the population as of October 1 had fallen below the level of the preceding year. (Table 3)

Table 3 Changes in the Population as of October 1 (2000-2006)
See the “Method of Intercensal Adjustment of Current Population Estimates ” to learn the difinition of the intercensal adjusted population.

These were the provisional estimates.
Here are the final estimates for 2001 to 2004.
is the final estimate for 2006.

  Population changes with natural increase (live birth minus death) and migration increase (entries minus exits). Natural increase underlying the population change was graduatly decreasing. It appears that the population has been entering decrease phase.

The population increased in 15 prefectures including Tokyo-to, Kanagawa-ken and Okinawa-ken while it decreased in 32 prefectures.

- Of 47 prefectures, 10 prefectures had a population of 3 million or more, 10 prefectures had 2 million or more, 20 prefectures had 1 million or more and 7 prefectures had less than 1 million. (Fig. 2)
- The population increased in 15 prefectures. Tokyo-to had the highest rate of increase at 4.2%, followed by Kanagawa-ken with 3.6% and Okinawa-ken with 3.3%. Even though population had increased in 24 prefectures in 2000, the number of prefectures that exhibited population increase in 2005 became 9 prefectures less.
- The population decreased in 32 prefectures. Akita-ken had the highest rate of decrease at 3.7%, followed by Wakayama-ken at 3.2% and Aomori-ken at 2.6%.
- As for the sex ratio (males per 100 females), Kanagawa-ken had the highest ratio at 102.2, followed by Saitama-ken at 101.6, Aichi-ken at 100.6 and Chiba-ken at 100.1. Only four prefectures recorded the ratio over 100. In contrast, Nagasaki-ken and Kagoshima-ken had the lowest ratio at 87.8, followed by Miyazaki-ken at 88.7 and Kochi-ken at 88.8. Those prefectures with a low ratio were in the Shikoku and Kyushu regions.

Figure 2 Population by Prefecture -2000, 2005

← Population pyramid

2. Population by Age →

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