Japan is the 2nd biggest market for music in the WORLD, so it's not that bad.
But breaking into the US market is more opportunistic.
Once you make it there, it opens the doors for you in many other markets as well.
ILY would've done impressively well for 2NE1 in Japan.
When the opening numbers came in, everyone was shocked.
Unfortunately, it didn't get the same promotion their other material got, so it fell off too quickly.
They should move onto to the US market.