Firstly, this is a Japan exclusive so you need to be here or at least know someone living in Japan to help you out who will also be here in December when he ships out.
Step1: Purchase Vjump that went on sale today, July 21st
Step2: Open the serial code between pages 266 & 267
Step4: Click the large orange apply button under 'step4' on the purchase page. In Japanese the button says "Vジャンプ応募者全員大サービスのお申し込みはこちら"
Step5: Enter serial code, you can enter up to a max of 10 codes at one time
Step6: Enter personal details, name, address, and select payment method (conbini or credit card)
Once your order is completed, the figure will ship out in December.If you live in Japan, and are not familar with Japanese I recommend using Google Translate but the process is very simple. If you have never purchased VJump before, you can find at your local bookshop, and some super-markets/conbini might sell as well!