DS Import Questions

I know these questions have probably already been asked somewhere but I couldnt find them when I searched for them.

1) Where can I buy an imported Nintendo DS Light from Japan? I have looked around at online stores and i couldnt find one that differentiated between US ones and Japanese ones. Also I am looking for an online store, I dont know anyone that is going nor am I going to Japan anytime soon

2) Could I use a US version DS Light to play japanese imported games? I know I am an idoit for asking this but oh well.

DS is region free, so you can play any game from any region on any DS from any region.

And why would you want a japanese DS? they are the same

Okay I did not know that they were region free so i assumed that i would have to get an import DS to play Japanese games.

Oh and thank you for your help