Finally got a response.

Seems I need to make a JPY wallet on MtGox.

Then buy
USD -> BTC

Then sell
BTC -> JPY

Click Settings -> Main Currency -> JPY -> Save

Now there will be 2 wallets, as a drop down. Click on the USD and will see JPY drop down option. Use that when selling BTC.

Hopefully we'll get our wires now.

Anyone else have experience doing this?