Verified answer

Guess What,

You can play Japanese DS games on any region DS system. So if you have a American DS & want to play Import Games, then all you have to do is pop them in.

If you have a Jap system and want to play American games, the same applies.

You can check out all the japanese DS games & systems here: http://store.videogamecentral.com/japaneseds.html

Have fun!

I believe the DS is region-free, like the gameboys before it, meaning they can play any game.