ΔE 10.2, fair: the same colour family, but not a straight swap. NATO Brown is a little darker, more muted, warmer than Brown (JGSDF).
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 10). NATO Brown is a little darker, more muted, warmer than Brown (JGSDF).
The same difference applies the other way round: Brown (JGSDF) is a little lighter, more saturated, cooler.
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 Brown (JGSDF) on the colour wheel See NATO Brown on the colour wheel
All matches: Brown (JGSDF) equivalents · NATO Brown equivalents