All your characters (AGED 13-17) learn exclusively through having sex with people. I'm not sure anyone would be willing to barter information with an army of child prostitutes. I don't think anyone would have sex with them, either.
Evil evil bleck markits. Evil evil bleck markits.
Scratch that. Or rather, don't because that's still pretty seekrit black markitty. This is Japan. Legal age is lower, unless I missed some news where they raised it to 18. 12 and below is the real illegal age.
Plus they can fake IDs if the odds you mentioned are not in their favour. Now that I think of it, let's see how to roll and roll at this.
Well, they can choose to go by another way, such as pointing a gun at your face and saying 'TELL ME RIGHT NOW GIVE ME THE INFORMATION' but that's too direct.
Let's see how these babies roll around.