ΔE 12.1, fair: the same colour family, but not a straight swap. Light DAK Sand is a little lighter, more muted than Japanese Brown.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Light DAK Sand is a little lighter, more muted than Japanese Brown.
The same difference applies the other way round: Japanese Brown is a little darker, more saturated.
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 Japanese Brown on the colour wheel See Light DAK Sand on the colour wheel
All matches: Japanese Brown equivalents · Light DAK Sand equivalents