BMobiles Platinum SIM for iPhone?

I'll be in Japan for a year as an ALT and am interested in Bmobile's Platinum SIM for the iPhone and using it monthly.

From what I've gathered in the forums, BMobile required you to bring proof of residency or local phone number.

Where do I go to purchase this SIM? I do NOT want the visitor SIM, which I know I can get online.

And what can I bring as proof of residency?

Will anything else be required of me since I am a foreigner?

I assume you don't read Japanese? Cause it's all here:

http://www.bmobile.ne.jp/platinum/index.html

BMobile SIM cards are sold only online. As proof of residency, you can submit a copy of your resident card (both sides).