HEAD TO HEAD
Italy vs Japan
Verdict
Japan holds a 60–40 advantage over Italy on the Relative Advantage Index, a clear margin.
The margin is driven by military spending (56% of the combined total, $62.2bn) and economic size (GDP) (63% 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1 factor — nuclear warheads — could not be scored because the figure is unpublished for at least one side.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 by factor
| Factor | Italy | Share | Japan | Weight |
|---|---|---|---|---|
Military spending SIPRI Milex | $48.1bn | 44%56% | $62.2bn | 33% |
Economic size (GDP) World Bank WDI | $2.4tn | 37%63% | $4.0tn | 27% |
Active personnel COW NMC | 161.0k | 39%61% | 247.0k | 20% |
Logistics & power projection OurAirports | 152 | 36%64% | 270 | 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 2026-10-22.
