I don't know if it's possible to do it from overseas or not. Each pull is about ¥890 or about $6.15. It also looks like 50 pulls gets you a blanket as a free gift, assuming I'm reading it all correctly.
Thank you for the update! Man, I wish I had money, the ability to read Japanese, and enough confidence that if I won the prize would be shipped overseas or something. Madoka best girl, so I would probably want just about anything except the jackpot, lol.