Sorry I may be reaching here. I think AML policies are no secrets. You can google it. A nations economy is sensitive to the amount of its currency entering and leaving its boarders. It's a slow and quiet battle but there is such thing as economic warfare which has been going on for decades.
I'm a newb. I could be completely wrong about my ideas. I believe that MtGox is under the scope right now due to US Authorities going after financial institutions that are possibly doing business with organized crime.
Adam Szubin, director of the U.S. Department of the Treasurys Office of Foreign Assets Control. Acting under the U.S. executive order, ... Szubin says. Targeting individual gang members wont result in big seizures, because there arent just large sitting accounts out there with the name on them, so the department is working to blacklist companies and individuals that hold, move, or launder funds for the syndicates, he says.
http://mobile.businessweek.com/articles/2013-11-07/japan-attacks-yakuza-crime-syndicates-via-banking-systemSo I think MtGox/Japan is doing everything to comply so they can stay afloat.