[nihonde]

Charges were dropped does not mean innocent. It means the investigation determined that the case wasn't worth pursuing. Japan has strict rules about importing drugs. The lack of drug abuse in Japan is one of the reasons it's not a shithole like nearly everywhere else. Obviously foreigners are in the crosshairs for that particular category of transgressions, since they come from places with different attitudes toward certain drugs, and since they get sent stuff in the mail. You can be pretty sure that she got the message that the Japanese authorities wanted to send her.