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

Japan vs Viet Nam: population pyramids in 1977

1977Swap

JapanViet Nam

2%1.5%1%0.5%0%0.5%1%1.5%2%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 Viet Nam compared

In 1977, Japan has a population of 115.1 million and Viet Nam 48.3 million; Japan is about 2.4 times the size of Viet Nam.

The share aged 65 and over is 8.2% in Japan and 5.2% in Viet Nam, 3.0 points higher in Japan. The median age is 31.0 years in Japan and 18.8 years in Viet Nam.

The total fertility rate is 1.79 in Japan and 5.29 in Viet Nam, so only Japan is below the replacement level of about 2.1. Life expectancy at birth is 75.3 years in Japan and 64.1 years in Viet Nam.

By 2050, the population of Japan is projected to shrink by 8.7% and that of Viet Nam to grow by 127.7% compared with 1977.

GDP per person is $36K in Japan (2025) and $5,066 in Viet Nam (2025).

Key figures (1977)

JapanViet Nam
Population115.1 million48.3 million
Aged 0–1423.9%41.1%
Aged 15–6467.9%53.6%
Aged 65+8.2%5.2%
Median age31.0 yrs18.8 yrs
Old-age dependency12.19.7
Total fertility rate1.795.29
Life expectancy75.3 yrs64.1 yrs
Population growth+0.89%+2.67%
Net migration (per year)-49,082+49,655
GDP$4.44T (2025)$515B (2025)
GDP per person$36K (2025)$5,066 (2025)
Unemployment2.5% (2025)1.5% (2025)

Economic figures are the latest year published for each country.

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