Notice the pattern. First USD withdrawals slowed down and stopped. Then EUR. Now JPY. Some days, BTC. This just screams "out of money" and "getting close to the collapse".
Make sure that the Japanese police have the fingerprints of the Mt. Gox management on file.
Exactly, the fact they are claiming that the local JP banks are backlogged is horse shit. JP banks were humming along fine the day after the holidays. A few thousand domestic transfers does not bring the JP banking system to a grinding halt. I'd be weary of keeping any large amounts of money/btc with them from this point out.