Japan Demographic Cohort & Median Age Workbench

Real historical progression (1974: 29y • 1994: 38y • 2024: 49y) & forward scenario projection

Median Age
49.0 yrs
Historical: 1974=29, 1994=38
Total Population
124.5 M
Peak: 128.1M (2008)
Elderly Share (65+)
29.8%
Super-Aged Society
Old-Age Dependency
50.7
Elders per 100 workers (15–64)
Youth Share (0–14)
11.4%
Working-Age: 58.8%
2024
5-Year Cohort Population Pyramid (2024)
Male Female Median Age
2024 Benchmark: Japan reaches a record median age of 49.0 years, with 29.8% of the population aged 65+.

Counterfactual Policy Projections

Adjust parameters for forward simulation from 2024 toward 2050.

1.20
Japan 2024 baseline ~1.20; Replacement level = 2.10
+75k / yr
Net foreign workers & residents intake impact
65 years
Redefines elderly boundary for dependency analysis
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