ΔE 5.2, very close: most people won’t see a difference side by side. Medium Drab is a little lighter, cooler than IJA #7 Ohryuko Nana Go Shoku (Olive Brown).
Yes, for most jobs. Very close match (ΔE 5). Medium Drab is a little lighter, cooler than IJA #7 Ohryuko Nana Go Shoku (Olive Brown).
The same difference applies the other way round: IJA #7 Ohryuko Nana Go Shoku (Olive Brown) is a little darker, 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 #7 Ohryuko Nana Go Shoku (Olive Brown) on the colour wheel See Medium Drab on the colour wheel
All matches: IJA #7 Ohryuko Nana Go Shoku (Olive Brown) equivalents · Medium Drab equivalents