We don't add games to the database that were only ever released in Asia or the game would already be in the database. It's unlikely that we'll add any more NES games at all, since as far as I know the database for NES games released in North America, Europe, Australia and Japan at this point is exhaustive.
"Too often we enjoy the comfort of opinion without the discomfort of thought." - John F. Kennedy on reality
"What if everything you see is more than what you see--the person next to you is a warrior and the space that appears empty is a secret door to another world? What if something appears that shouldn't? You either dismiss it, or you accept that there is much more to the world than you think. Perhaps it really is a doorway, and if you choose to go inside, you'll find many unexpected things." - Shigeru Miyamoto on secret doors to another world