Quote:"The court proceedings that will now follow should reveal the true extent of TEPCO's and the Japanese regulatory system's enormous failure to protect the people of Japan," said Hisayo Takada, deputy programme director at the organisation's Japan office.
A report by the International Atomic Energy Agency last year said a misguided faith in the complete safety of atomic power was a key factor in the Fukushima accident.
It pointed to weaknesses in disaster preparedness and in plant design, along with unclear responsibilities among regulators.
A 2012 parliamentary report also said Fukushima was a man-made disaster caused by Japan's culture of "reflexive obedience", but no one has been punished criminally.
The three execs will plead not guilty.