"In a written complaint, they said the central and prefectural governments failed to promptly release accurate data on airborne radiation levels after the nuclear crisis, neglecting their duty to prevent residential radiation exposure as much as possible, and exposing children to radiation."
"As a result, the parents and children are seriously worried about their health down the road and are suffering from mental distress, they said in the complaint." One woman's child became ill after the initial radiation releases.
"Of the 88 plaintiffs, 24 children who live in Fukushima and are still attending school there are demanding that local municipal offices affirm their right to receive education in a safe environment." The Japan Times
Radiation is known to cause various diseases. The information sharing and evacuations following Fukushima were clearly botched and some people were exposed to radiation because of this incompetent handling of the crisis.
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.