"A group of parents and children who were residing in Fukushima Prefecture when the nuclear disaster unfolded in March 2011 is suing the central and prefectural governments for failing to take sufficient steps to protect children from radiation exposure during the crisis." The Japan Times
Children are particularly vulnerable to radiation exposure, so these families are not waiting until someone has taken ill to sue for compensation. This lawsuit implies that exposure to radiation against their will, and due to government incompetence, is enough to allow them compensation since their risk of contracting certain diseases has been increased. More