They’re currently running a week long campaign in which all merchandise purchased from the site will earn you 3% of the total purchase price as points instead of the usual 1%. This is pretty good if you shop here often, or plan on shopping here again. The campaign runs from 12/19/2011, 12:00 AM until 12/26/2011, 11:59 PM JST.
More information about the campaign can be found here. You will receive the points at the end of the next month from the shipping date.