"The defendant's factory was a leading chemical plant with the most advanced technology and facilities. As such, the defendant should have diligently researched the relevant literature and should have assured the safety of its wastewater... Also the defendant should have cast a watchful eye on the environmental conditions of the area... Defendants should have made sure that no harm whatsoever came to the residents in the area... It would have been possible to foresee the risk from the discharged water... The defendant could have prevented the occurrence of Minamata disease or at least have kept it at a minimum. We cannot find that the defendant took any of the precautionary measures called for in this situation whatsoever... We cannot find even one measure taken by the defendant that was either adequate or satisfactory... The presumption that the defendant had been negligent from beginning to end in discharging wastewater from its acetaldehyde plant is amply supported. Even if the quality of wastewater was within legal and administrative standards and the facilities and methods of treatment... were superior to those of other factories in the same industry, it is not enough to overcome this presumption... The defendant cannot escape liability for negligence..."