Got this awhile back here on Playasia. Worked perfectly on my Asian PS3, HK PSN account. Was able to purchase Tekken 5 DR HD on the HK Playstation Store without a hitch. And I still have some change left over for addons.
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Official PlayStation™ Network Prepaid Card (10000 YEN)
These points are only suitable for the Japanese PlayStation™ network!
Issued by Japanese convenient store, ships without packing
To Everyone Playing the Asian Versions of Games If you are like me and take advantage of the lower prices found on the Asian versions of PS3 games, then these cards are a MUST-BUY! Some of the DL content from games is region specific (for example, Fallout 3) meaning that if you have an Asian version, you'll need credit in an Asian PSN account to purchase it. These PSN cards from Hong Kong are the easiest way to do it. They are a little more expensive than face value, but add free shipping and the $5 off from a coupon, and it turns out to be a pretty good deal.
Spend wisely on spending You just can't go wrong here. It's easy to use, it doesn't matter where you are, and you're now free to buy anything you like from the Japanese PSN. From games to add-ons to apartments & clothes in Home, it will all be open to you. If you use the Japanese PSN or Home, this card is a MUST!
The 5000 Yen PSN card is a must buy for the import gamers who frequent the Japanese PSN store. These cards make it unbelievably easy to make purchases off of the Japanese PSN Network. The 5000 yen card was a very sweet deal, allowing me to purchase several Japanese PS3 and PSP games without hassle or frustration. This is essential for PS3 and PSP owners who love playing classic Japanese PS One games and digital only games like Rockman 9 and Marvel Vs Capcom 2.