It's simple.
You need a ps3 and a psp.
Then the ps3 has to be connected straight to the internet, no wireless.
Then make a japanese account, download ad hoc party.
Then you can just log on if you connect your psp through wireless network to ps3 while running a game while in the games lan play with ad hoc on.
Later on you can just find players with the game you're having the connection with.