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

Thailand vs Japan: population pyramids in 1978

1978Swap

ThailandJapan

1.5%1%0.5%0%0.5%1%1.5%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.

Thailand and Japan compared

In 1978, Thailand has a population of 43.3 million and Japan 116.1 million; Japan is about 2.7 times the size of Thailand.

The share aged 65 and over is 3.2% in Thailand and 8.5% in Japan, 5.3 points higher in Japan. The median age is 19.0 years in Thailand and 31.4 years in Japan.

The total fertility rate is 3.62 in Thailand and 1.79 in Japan, so only Japan is below the replacement level of about 2.1. Life expectancy at birth is 61.3 years in Thailand and 75.7 years in Japan.

By 2050, the population of Thailand is projected to grow by 53.5% and that of Japan to shrink by 9.5% compared with 1978.

GDP per person is $8,057 in Thailand (2025) and $36K in Japan (2025).

Key figures (1978)

ThailandJapan
Population43.3 million116.1 million
Aged 0–1440.8%23.8%
Aged 15–6456.1%67.7%
Aged 65+3.2%8.5%
Median age19.0 yrs31.4 yrs
Old-age dependency5.712.5
Total fertility rate3.621.79
Life expectancy61.3 yrs75.7 yrs
Population growth+2.12%+0.84%
Net migration (per year)+82,011-47,996
GDP$577B (2025)$4.44T (2025)
GDP per person$8,057 (2025)$36K (2025)
Unemployment0.8% (2025)2.5% (2025)

Economic figures are the latest year published for each country.

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