Japan holds a 71–29 advantage over Mexico on the Relative Advantage Index, a decisive margin.
The margin is driven by military spending (82% of the combined total, $62.2bn) and economic size (GDP) (68% of the combined total, $4.0tn).
1 factor — nuclear warheads — could not be scored because the figure is unpublished for at least one side. Those factors are excluded and the remaining weights renormalised, never substituted.
| Factor | Japan | Share | Mexico | Weight |
|---|---|---|---|---|
Military spending SIPRI Milex | $62.2bn | 82%18% | $13.6bn | 33% |
Economic size (GDP) World Bank WDI | $4.0tn | 68%32% | $1.9tn | 27% |
Active personnel COW NMC | 247.0k | 53%47% | 216.0k | 20% |
Logistics & power projection OurAirports | 270 | 75%25% | 89 | 20% |
Shares are each side's portion of the combined total for that factor. Weights are renormalised across the factors both sides publish — see the methodology. Data read 2026-08-04.
Every combination inside the top 30 of the Composite Power Index.
Bordering states — the comparisons people actually search for.