Mexico vs Japan: What the Numbers Mean

Mexico has a population of 128,900,000 and is growing at 0.68% per year.Japan has a population of 123,800,000 and is declining at -0.53% per year. The difference between them is 5,100,000 people, with Mexico in the lead.

Population is more than a headcount. Mexico has a density of 129 people per km² across 1,000,000 km², while Japan has a density of 124 people per km² across 1,000,000 km². These figures shape how each country manages housing, infrastructure, and resources. For how these numbers are computed, see our Methodology page.