ΔE 7.3, close: similar, with a visible difference side by side. IJA Grey Green is a little lighter than Nakajima Interior Green.
Usually, if you are not matching paint already on the model. Close match (ΔE 7). IJA Grey Green is a little lighter than Nakajima Interior Green.
The same difference applies the other way round: Nakajima Interior Green is a little darker.
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 Nakajima Interior Green on the colour wheel See IJA Grey Green on the colour wheel
All matches: Nakajima Interior Green equivalents · IJA Grey Green equivalents