ΔE 9.7, close: similar, with a visible difference side by side. Evergreen Fog is a little darker, more muted, cooler than IJA Nakajima Green.
Usually, if you are not matching paint already on the model. Close match (ΔE 10). Evergreen Fog is a little darker, more muted, cooler than IJA Nakajima Green.
The same difference applies the other way round: IJA Nakajima Green is a little lighter, more saturated, warmer.
ΔE is the colour difference between our two swatch estimates: under about 6 is close, over about 15 is loose. Real paints also differ in finish, coverage and how they thin, so test before you commit.
See IJA Nakajima Green on the colour wheel See Evergreen Fog on the colour wheel
All matches: IJA Nakajima Green equivalents · Evergreen Fog equivalents