Japan vs Kenya
Japan has 2.1× the population of Kenya: 123,366,734 vs 57,532,493, a gap of 65.8 million. Kenya is growing faster (+1.93% vs −0.49% a year), adding about 1,110,192 people a year against −607,141. Using continuous exponential growth from the stated base year, if these rates held, Kenya would overtake Japan in about 31 years (from the 2025 population bases, around 2056) — a projection, not a forecast. Japan is the older society: 30.0% aged 65+ against 3.0% in Kenya, while Kenya has more children (36.3% under 15 vs 11.2%). Japan is 3.6× as densely populated (341.5 vs 95.3 people per km²). People in Japan live 20.2 years longer on average (84.0 vs 63.8). GDP per capita is 15.2× higher in Japan ($35,951 vs $2,363).
Country/territory population bases: World Bank 2025 (Japan) and 2025 (Kenya); growth years 2025 / 2025. Annual source values, not live counts; years may differ. Growth is national, not local.
Japan vs Kenya — side by side
 Japan |  Kenya | |
|---|---|---|
| Population | 123,366,7342025 | 57,532,4932025 |
| Growth rate / yr | −0.49%2025 | +1.93%2025 |
| Births per 1,000 | 5.72024 | 27.02024 |
| Deaths per 1,000 | 13.32024 | 7.22024 |
| Children per woman | 1.152024 | 3.172024 |
| Life expectancy | 84.0 yrs2024 | 63.8 yrs2024 |
| Aged 0–14 | 11.2%2025 | 36.3%2025 |
| Aged 65+ | 30.0%2025 | 3.0%2025 |
| Density | 341.5 /km²2023 | 95.3 /km²2023 |
| Area | 377,969 km²2023 | 591,969 km²2023 |
| Urban population | 92.3%2025 | 32.2%2025 |
| Net migration / yr | +140,5792025 | -27,3302025 |
| GDP per capita | $35,9512025 | $2,3632025 |
| Country population rank (available records) | #12 | #26 |
| Base / world population (World Bank 2025) | 1.50% | 0.70% |
Highlighted cell = the higher value (not "better"). Small print under each value is its own data year. Source: World Bank; country/territory population bases may have different years. These are not live counts.
Population since 1960
World Bank population history (not the separate UN WPP timeline). Japan: 1.3× from 1960 to 2025; Kenya: 7.5× from 1960 to 2025. Left: absolute population. Right: each series indexed to its own first available year = 100; baseline years may differ.
More comparisons
Regions: East Asia & Pacific · Sub-Saharan Africa · rankings
Japan: Japan vs India, Japan vs China, Japan vs United States, Japan vs Indonesia, Japan vs Pakistan, Japan vs Nigeria, Japan vs Brazil, Japan vs Bangladesh.
Kenya: Kenya vs India, Kenya vs China, Kenya vs United States, Kenya vs Indonesia, Kenya vs Pakistan, Kenya vs Nigeria, Kenya vs Brazil, Kenya vs Bangladesh.
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