@icarushector the guy being a adult with a minor in that situation would end up on the whole, societal in japan is everything, it's also why they have things like hikki problem and high suicide rate, as your social status effects how people treat you over there, so yeah, he wouldn't dare try to actually sue him, unless he was suicidal.
On the legal system, I know when someone is a suspect in a crime, the japanese police are harsh, so harsh infact they go hours and hours of integration till you admit to it, even if you were innocent, they go for high conviction rates over there, from what I gather.