Nope. You can create a new account and that is it. I was disapointed in this. My sign on is dadanman but the dumb***** that can't read misses the N and calls me dada man. Stupid? or do they really just want me to be their Daddy?
yes you can change ur psn but first u have to create a japaneses account then once you have done that go to account manager click on the first one should come up with a load of japanese symbols go to the 2nd from last and u can change it