Hello guys, i have never used MtGox, but now i may be able to open a Japanese bank account. Now when i try to open an account it asks me if i will open a USD account or a JPY account, the questions are:

Can i open a USD Mtgox account and then withdraw USD via "Japanese Domestic Transfer"?  
Or, Do i need to open a JPY MtGox account to be able to withdraw via "Japanese Domestic Transfer"?

I would normally ask to MtGox but seems like they are VERY busy. I can only open ONE account at Mtgox and the verification lasts 2 weeks, so i better ask before making any mistake. Anyone experienced with Japanese Domestic Transfers at MtGox?