World Population PyramidsPopulation pyramids and indicators by country and year日本語

Japan vs Republic of Korea: population pyramids in 2004

2004Swap

JapanRepublic of Korea

1%0.75%0.5%0.25%0%0.25%0.5%0.75%1%0102030405060708090100MaleFemale

Each bar is the share of the total population at that single year of age (men left, women right), so countries of different sizes can be compared.

Japan and Republic of Korea compared

In 2004, Japan has a population of 127.7 million and the Republic of Korea 47.6 million; Japan is about 2.7 times the size of the Republic of Korea.

The share aged 65 and over is 19.3% in Japan and 8.4% in the Republic of Korea, 10.9 points higher in Japan. The median age is 43.0 years in Japan and 33.6 years in the Republic of Korea.

The total fertility rate is 1.28 in Japan and 1.16 in the Republic of Korea, both below the replacement level of about 2.1. Life expectancy at birth is 82.1 years in Japan and 78.0 years in the Republic of Korea.

By 2050, the population of Japan is projected to shrink by 17.8% and that of the Republic of Korea to shrink by 4.9% compared with 2004.

GDP per person is $36K in Japan (2025) and $36K in the Republic of Korea (2025).

Key figures (2004)

JapanRepublic of Korea
Population127.7 million47.6 million
Aged 0–1413.9%19.9%
Aged 15–6466.8%71.7%
Aged 65+19.3%8.4%
Median age43.0 yrs33.6 yrs
Old-age dependency28.911.7
Total fertility rate1.281.16
Life expectancy82.1 yrs78.0 yrs
Population growth+0.10%+0.35%
Net migration (per year)+69,014-42,549
GDP$4.44T (2025)$1.87T (2025)
GDP per person$36K (2025)$36K (2025)
Unemployment2.5% (2025)2.7% (2025)

Economic figures are the latest year published for each country.

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