When you make a sequel to a highly successful title, there is always a good amount of sales that will be guaranteed. But I doubt Namco Bandai and From Software were expecting quite a large demand for their highly difficult title Dark Souls. According to numbers released by From Software today, 1.5 million units of the game have been shipped out worldwide.
North America has received the largest shipment with 620,000 copies, with Europe receiving 470,000 and Japan only 370,000. Now shipped games do not guarantee the same amount of sales but usually the number means that there is just that high of a demand for the title. With most Japanese titles selling better in the West than in their original country, perhaps this is a sign that Japanese developers should work on localizing more of their titles hm?