It is located at this URL: http://www.pokemoncenter-online.com/
When it officially opens on February 16th, it will have an exclusive set of Kanto gym badges up for sale at 19,440 yen. They will also be giving away one of three document case covers with a purchase of 5,000 yen or more. A 3,000 yen or more purchase will get you free shipping, other wise shipping is 500 yen.
It is very unlikely they will ship outside Japan, but we will keep you updated just in case!