Japan holds a 78–22 advantage over Thailand on the Relative Advantage Index, a decisive margin.
The margin is driven by military spending (91% of the combined total, $62.2bn) and economic size (GDP) (88% of the combined total, $4.0tn). Thailand leads on active personnel.
1 factor — nuclear warheads — could not be scored because the figure is unpublished for at least one side.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 | Thailand | Weight |
|---|---|---|---|---|
Military spending SIPRI Milex | $62.2bn | 91%9% | $6.0bn | 33% |
Economic size (GDP) World Bank WDI | $4.0tn | 88%12% | $527bn | 27% |
Active personnel COW NMC | 247.0k | 41%59% | 361.0k | 20% |
Logistics & power projection OurAirports | 270 | 81%19% | 64 | 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.