[Nyororin]

I have no idea what you were doing, but it seems really weird that something so weird would happen to you not just once, but twice in the same short period of time.
I`ve never been pickpocketed. I`ve left my bag sitting on tables, and never had it touched.

Are you SURE you were in Japan and not some other country? Because packs of poor orphans stealing your stuff at the airport does NOT seem likely.