An appeal has been filed against a ruling that cleared three former Tokyo Electric Power Company executives of professional negligence resulting in death and injury. It was the only criminal prosecution arising from the Fukushima nuclear disaster in 2011.
The Tokyo District Court acquitted the men on September 19.
The presiding judge said it was impossible for them to predict the occurrence of a massive tsunami triggered by a major earthquake. He also said regulations and the state review at the time didn't assume that the utility had to secure the absolute safety of the nuclear power plant.
Lawyers who serve as prosecutors appealed to the Tokyo High Court on Monday.
In a statement, they said they totally oppose the latest ruling, and have decided to seek the judgment of a higher court.