I just wonder how long a tip like that will take to trickle thru the Japanese system before anything would be done. likely there is no precedent for something like this either. as much as people call bitcoin a currency it is really not and is not subject to the same financial standards and laws. for instance could i get that same agency involved if someone stole all my wow gold it is effectively the same concept and is a "digital currency" as well.
there is a huge grey area here and it will likely be addressed in the coming months.  just my 2 cents