Soo.. as I said before (on other topics):
Nintendo of Japan is making all the calls here, no NoA or Europe. Japan. What language is this petition not in? =D Yes, Japanese! So, basically, you're sending a petition with a bunch of meaningless signatures to a corporate office that has no control over policy issues. Japan is the one that drives the Nintendo machine and makes the decisions as to what goes on, and the other branches follow along and adapt for their own markets.
To add to it, online petitions are useless. According to studies, people don't really listen to internet forms on things like this. Why? Because it's too easy. All one person has to do is type their name and call it a "signature". Since it requires no effort from the individual, it shows that they aren't really dedicated. Senators and other public officials stopped listening to e-mail campaigns (and even mass-mailing campaigns that only use a printed letter) years ago. Companies are the same. Even worse, you can falsify signatures on an online petition, making it even more useless.
Assuming that the petition would be listened to (it won't), you're sending it to a company that has no control over anything. Since Nintendo of Japan is not only.. shock, in Japan, they generally listen to Japanese gamers anyway.
If you want to give this petition a shot, then it needs to be done by walking the streets and collecting signatures.. in Japan. =D And written in Japanese.
(of course, no company in their right mind would change a whole region-policy just because of that, but at least you'd be closer to a slim chance, instead of nowhere near)
o_o Yeeeep.