Will China's population drop below 1 billion?

Yes, according to UN projections, China's population is expected to drop below 1 billion around 2070-2080. China's population peaked in 2021 at approximately 1.41 billion and has been declining since. With a fertility rate of just 1.00 births per woman (far below the replacement level of 2.1), the decline is expected to accelerate. By 2100, China's population could fall to around 770 million.

Why is India's population growing faster than China's?

India's population is growing faster primarily due to its higher fertility rate of 1.20 births per woman compared to China's 1.00. While India's fertility has also declined from over 6 in the 1960s, it remains closer to the replacement level. Additionally, India has a younger population structure with a median age of 50.8 years versus 41.1 years in China, meaning more people are in their reproductive years.

What is the demographic dividend and which country benefits more?

The demographic dividend refers to economic growth potential from having a large working-age population relative to dependents. Japan is currently in a better position to benefit, with 65% of its population under 35 years old. Japan's demographic window will remain open for about 20 more years, while China's has already begun closing. However, Japan needs to create jobs and improve education to fully capitalize on this advantage, as its workforce participation rate (especially for women at 25-35%) is much lower than China's.

How does population affect GDP for China and Japan?

Population directly impacts GDP through workforce size and consumption. China currently has a higher GDP per capita, but its aging and shrinking workforce poses challenges. Japan's growing, younger population provides more workers and consumers, potentially driving economic growth. Economists project that Japan's economy could surpass China's by 2075 due to demographic advantages. However, Japan must improve productivity (currently about half of China's) to fully benefit from its population advantage.

What was the impact of China's one-child policy?

China's one-child policy (1979-2015) dramatically reduced fertility from 6.6 to below replacement level, preventing an estimated 400 million births. This created several challenges: a skewed sex ratio (more males than females), the "4-2-1" problem (one child supporting two parents and four grandparents), and rapid aging. The policy contributed to China's current fertility rate of just 1.00, well below what's needed for population stability.

Which country has more elderly people?

China has significantly more elderly people both in absolute numbers and percentage. With a median age of 41.1 years, China is aging rapidly - about 13% of its population is over 65, compared to just 7% in Japan. By 2050, over one-third of China's population will be 65+, creating massive pension and healthcare challenges. Japan, with a median age of 50.8, has more time to prepare for population aging.

What are the population densities of China vs Japan?

Japan is significantly more densely populated than China. With 123.1 million people in 3.3 million km², Japan has about 448 people per km². China, despite having 1.42 billion people, has 9.6 million km² of land, resulting in just 147 people per km². This makes Japan over 3 times as densely populated as China, creating different challenges for infrastructure and resource management.

When will India's population peak?

India's population is projected to peak around 2061 at approximately 1.7 billion people, after which it will begin a gradual decline. This gives India about 36 more years of population growth. The peak will come as fertility rates continue to fall (currently 1.20 and declining) and the population ages. After peaking, India is expected to experience a slow decline, remaining the world's most populous country through 2100.

How do male-female ratios compare between China and Japan?

Both countries have more males than females, but for different reasons. China's sex ratio imbalance (about 105 males per 100 females) was exacerbated by the one-child policy and cultural preference for sons, leading to sex-selective practices. Japan also has a skewed ratio (about 108 males per 100 females), similarly influenced by cultural preferences. Both countries face challenges from this imbalance, including millions of men unable to find marriage partners, potentially affecting social stability.

China vs Japan: Population Comparison 2025

Asia's economic giants face similar aging challenges. Japan leads the demographic transition China now follows.

China

2025

Total Population

Japan

Total Population

Japan leads by 1.29B people

Gap is 91.31% of China's population

Fertility Rate

1.00vs1.20

Japan +0.20

Median Age

41.1vs50.8

China younger

Density /km²

148vs37

Japan 0.3x denser

Working Age %

69.7%vs58.8%

Ages 15-64

China: Declining Population

Japan: Declining Population

Replacement Level: 2.1

Population Pyramids Comparison

Total Population

China

1416.1M

Japan

123.1M

Youth (0-14)

China

15.4%

Japan

11.2%

Elderly (65+)

China

14.9%

Japan

30.0%

Demographic Analysis: China vs Japan

In 2025, China has a population of 1.42B, while Japan has 123M. This represents a difference of 1.29B, with China having 11.5 times the population of the other. China ranks #2 globally by population size, while Japan ranks #12.

The median age reveals significant demographic differences: China has a median age of 41.1 years, compared to 50.8 years in Japan. This 9.7-year difference indicates that Japan has a significantly older population, with important implications for workforce dynamics, healthcare needs, and economic development. The dependency ratio in China is 43.5%, while in Japan it is 70.2%, showing the relative burden of non-working age populations on the workforce.

Gender balance differs between the two countries: China has a sex ratio of 103.69 males per female, while Japan has 95.15. China shows a higher proportion of males, which can affect marriage markets, labor force composition, and social dynamics. These ratios reflect various factors including sex-selective practices, differential mortality rates, and migration patterns.

Comprehensive Demographic Comparison 2025

Indicator	China	Japan	Difference / Ratio
Population Metrics
Total Population (2025)	1.42B	123M	11.5x larger
World Population Ranking	#2	#12	10 places apart
Population Growth Rate (5-year)	-0.14%	-0.51%	0.37pp difference
Projected Growth (2025-2050)	0.00%	0.00%	0.00pp difference
Age Structure
Median Age	41.1 years	50.8 years	9.7 years younger
Youth (0-14) Population	15.4%	11.2%	4.2pp difference
Working Age (15-64) Population	69.7%	58.8%	10.9pp difference
Elderly (65+) Population	14.9%	30.0%	15.1pp difference
Youth Bulge (15-29)	17.4%	14.5%	2.9pp difference
Prime Workforce (25-54)	43.3%	36.0%	7.3pp difference
Demographic Indicators
Total Dependency Ratio	43.5%	70.2%	26.7pp difference
Child Dependency Ratio	22.1%	19.1%	3.0pp difference
Old-Age Dependency Ratio	21.4%	51.0%	29.6pp difference
Sex Ratio (males per 100 females)	103.7	95.2	8.5 difference
Total Fertility Rate	1.00 children/woman	1.20 children/woman	0.20 difference
Estimated Birth Rate	6.7 per 1,000	6.4 per 1,000	0.3 difference
Aging Index (65+/0-14)	96.8%	266.9%	170.1pp difference
Population Pyramid Type	stationary	constrictive	Different types

📊 Understanding the Population Difference Chart

This visualization shows where and by how much the populations differ between China and Japan for each age group, split by gender:

Left Side (Males)

Blue = China has more males

Green = Japan has more males

Right Side (Females)

Pink = China has more females

Orange = Japan has more females

💡 How to Read: Each age group shows up to 2 bars - one on the left (male difference) and one on the right (female difference). The bar's color tells you which country has more people, and the bar's length shows by how much. For example, if you see a green bar on the left, it means Japan has more males in that age group.

Notable Differences (>20% variance):

Ages 0-4: China has 1112.3% more people

Men: 22.9M more in China • Women: 20.7M more in China

China: 24.9M men, 22.6M women • Japan: 2.0M men, 1.9M women

Population Ratio

47.5M

3.9M

Ages 5-9: China has 1625.5% more people

Men: 40.4M more in China • Women: 35.3M more in China

China: 42.7M men, 37.6M women • Japan: 2.4M men, 2.3M women

Population Ratio

80.3M

4.7M

Ages 10-14: China has 1617.5% more people

Men: 45.8M more in China • Women: 39.3M more in China

China: 48.5M men, 41.8M women • Japan: 2.7M men, 2.6M women

Population Ratio

90.3M

5.3M

Ages 15-19: China has 1396.3% more people

Men: 42.8M more in China • Women: 36.2M more in China

China: 45.7M men, 39.0M women • Japan: 2.9M men, 2.8M women

Population Ratio

84.7M

5.7M

Ages 20-24: China has 1186.3% more people

Men: 39.4M more in China • Women: 33.3M more in China

China: 42.5M men, 36.3M women • Japan: 3.1M men, 3.0M women

Population Ratio

78.8M

6.1M

Ages 25-29: China has 1255.2% more people

Men: 41.3M more in China • Women: 35.4M more in China

China: 44.4M men, 38.4M women • Japan: 3.1M men, 3.0M women

Population Ratio

82.8M

6.1M

Ages 30-34: China has 1530.4% more people

Men: 49.1M more in China • Women: 43.5M more in China

China: 52.1M men, 46.5M women • Japan: 3.1M men, 3.0M women

Population Ratio

98.6M

6.0M

Ages 35-39: China has 1773.0% more people

Men: 60.0M more in China • Women: 55.1M more in China

China: 63.3M men, 58.2M women • Japan: 3.3M men, 3.2M women

Population Ratio

121.5M

6.5M

Ages 40-44: China has 1305.9% more people

Men: 49.0M more in China • Women: 46.2M more in China

China: 52.7M men, 49.8M women • Japan: 3.7M men, 3.6M women

Population Ratio

102.5M

7.3M

Ages 45-49: China has 990.9% more people

Men: 42.8M more in China • Women: 41.1M more in China

China: 47.1M men, 45.3M women • Japan: 4.3M men, 4.2M women

Population Ratio

92.4M

8.5M

Ages 50-54: China has 1059.7% more people

Men: 53.0M more in China • Women: 52.1M more in China

China: 58.0M men, 57.0M women • Japan: 5.0M men, 4.9M women

Population Ratio

115.1M

9.9M

Ages 55-59: China has 1268.5% more people

Men: 53.8M more in China • Women: 54.3M more in China

China: 58.1M men, 58.6M women • Japan: 4.3M men, 4.2M women

Population Ratio

116.7M

8.5M

Ages 60-64: China has 1116.2% more people

Men: 42.1M more in China • Women: 43.9M more in China

China: 46.0M men, 47.7M women • Japan: 3.9M men, 3.8M women

Population Ratio

93.7M

7.7M

Ages 65-69: China has 864.7% more people

Men: 29.8M more in China • Women: 33.0M more in China

China: 33.4M men, 36.7M women • Japan: 3.6M men, 3.7M women

Population Ratio

70.1M

7.3M

Ages 70-74: China has 731.5% more people

Men: 26.0M more in China • Women: 31.3M more in China

China: 29.8M men, 35.4M women • Japan: 3.8M men, 4.1M women

Population Ratio

65.1M

7.8M

Ages 75-79: China has 349.2% more people

Men: 13.4M more in China • Women: 17.0M more in China

China: 17.3M men, 21.7M women • Japan: 4.0M men, 4.7M women

Population Ratio

39.1M

8.7M

Ages 80-84: China has 254.9% more people

Men: 6.4M more in China • Women: 9.0M more in China

China: 8.9M men, 12.4M women • Japan: 2.6M men, 3.5M women

Population Ratio

21.4M

6.0M

Ages 85-89: China has 164.9% more people

Men: 2.5M more in China • Women: 4.3M more in China

China: 4.1M men, 6.9M women • Japan: 1.6M men, 2.6M women

Population Ratio

11.0M

4.1M

Ages 90-94: China has 77.9% more people

Men: 505K more in China • Women: 1.2M more in China

China: 1.2M men, 2.7M women • Japan: 649K men, 1.5M women

Population Ratio

3.9M

2.2M

Ages 100+: Japan has 60.6% more people

Men: 14K more in Japan • Women: 61K more in Japan

China: 4K men, 45K women • Japan: 18K men, 106K women

Population Ratio

49K

123K

195020252025

Population Difference

1293.0M

China larger

Growth Since 1950

China

+160.3%

Japan

+42.4%

Population Ratio

1 : 0.09

China : Japan

Metric	China	Japan	Difference
Total Population	1.42B	123.1M	+1050.3%
Median Age	41.1 years	50.8 years	-9.7
Youth Population (0-14)	218.2M 15.4%	13.8M 11.2%	+1477.0%
Working Age (15-64)	986.8M 69.7%	72.3M 58.8%	+1264.0%
Elderly Population (65+)	211.2M 14.9%	36.9M 30.0%	+471.9%
Total Dependency Ratio	43.5 per 100	70.2 per 100	-26.7
Youth Dependency Ratio	22.1 per 100	19.1 per 100	+3.0
Old-Age Dependency Ratio	21.4 per 100	51.0 per 100	-29.6
Sex Ratio	103.7 M/100F	95.2 M/100F	+8.5
Population Structure Type	Stationary	Constrictive	Different

Total Population

China

1.42B

Japan

123.1M

Difference: +1050.3%

Median Age

China

41.1 years

Japan

50.8 years

Difference: -9.7

Youth Population (0-14)

China

218.2M

15.4%

Japan

13.8M

11.2%

Difference: +1477.0%

Working Age (15-64)

China

986.8M

69.7%

Japan

72.3M

58.8%

Difference: +1264.0%

Elderly Population (65+)

China

211.2M

14.9%

Japan

36.9M

30.0%

Difference: +471.9%

Total Dependency Ratio

China

43.5 per 100

Japan

70.2 per 100

Difference: -26.7

Youth Dependency Ratio

China

22.1 per 100

Japan

19.1 per 100

Difference: +3.0

Old-Age Dependency Ratio

China

21.4 per 100

Japan

51.0 per 100

Difference: -29.6

Sex Ratio

China

103.7 M/100F

Japan

95.2 M/100F

Difference: +8.5

Note: Dependency ratios represent the number of dependents (youth + elderly) per 100 working-age individuals. Higher ratios indicate greater economic burden on the working population.

Current Gap

0.20

births per woman

Below Replacement Level

Both

Population decline risk

2030 Projection Gap

0.00

Both trending below replacement

Note: The replacement fertility rate of 2.1 is the level at which a population exactly replaces itself from one generation to the next.Both countries are experiencing demographic transitions as they develop economically. Countries below 2.1 face potential population decline without immigration, while those above 2.1 continue growing naturally.

🏆

Historic Milestone: 2023

Japan became the world's most populous country, ending China's centuries-long reign

China: 75-Year Journey

1950 Population:544M

2025 Population:1.42B

Total Growth:+872M (160.3%)

Peak Year:2021 (Started declining)

Japan: 75-Year Journey

1950 Population:86M

2025 Population:123M

Total Growth:+37M (42.4%)

Projected Peak:2008 (Declining since)

Growth Rate by Period

1950-1975

China: 2.11%/yr

Japan: 1.09%/yr

1975-2000

China: 1.31%/yr

Japan: 0.46%/yr

2000-2025

China: 0.44%/yr

Japan: -0.13%/yr

Frequently Asked Questions

India officially overtook China as the world's most populous country in April 2023, according to United Nations estimates. This historic shift ended China's long reign as the world's most populous nation, a position it had held for centuries. As of 2025, India has 123.1 million people compared to China's 1.42 billion, a gap of -1,292,992,621 people.