I still don't understand how such a well known public figure like Mark K. won't face any prosecution if they really did run off with the coins... just because we are dealing with crypto currency and not "actual money" basic laws don't apply? That's BS
IANAL and I am not familiar with Japanese law, but it seems exceedingly unlikely that no laws apply. Delaying filing of insolvency almost certainly applies (assuming that he did). Anything MtGox said after they went insolvent may constitute a crime, provided they are insolvent.
I find it unlikely that the Japanese bureaucracy tries to stay out, quite the opposite. The state is usually eager to meddle. In fact it would be a very interesting precedent if the state of Japan declares that Bitcoin is none of it's business.