More Songs Music

Why do the Japanese imports of music albums have more songs?
I notice that every Japanese album I see has more songs than it's American correspondent. Why?
In Japan, albums cost about 40 USD, compared to the 15-20 bucks in the states. So, they put those extra tracks on there to discourage importing and losing about 20-25 dollars profit on an album.
Matthew West- "More" w/ lyrics