Nippon Steel Corp. detected cyanide in waterways near its East Nippon Works in Kimitsu, Chiba Prefecture, 59 times over five years, according to a report the steelmaking giant submitted to local governments in the prefecture.
The company did not disclose the information at the time, and in some cases, the company denied the substance had been detected.
Going forward, Nippon Steel said it will release data on water quality to the public and take other measures to prevent a recurrence of the problem.
