Would you be willing to answer a few brief questions about PlayStation Forums?
Have: PS3 bought in the US, Asura's Wrath bought in the US, Japanese credit card.
Can't add funds to store because I can't change my country in billing details.
Used my Japanese account to use credit card. Asura's Wrath, US version, DLC is not available in the Japanese store.
How do I go about getting the DLC for Asura's Wrath?
Buy a prepaid USA Playstation Network Card from ebay.