Some people have already known about a trash problem in Aokigahara-jukai. I joined a project to remove colored plastic tapes stretching around and around deep inside the jukai . That taping vandalize is done by young people as a game (like survival games? ), they say. I don't know if they know to walk around the restricted area and to tread down the mossy ground or to snap even a twig are illegal by Natural Parks Law. They break the rule and damage the jukai as well.
Unfortunatelly, we found other bunch of trash there.