Majia here: This is a very interesting development because in September 2013 a decision AGAINST indictment was made, which apparently was reversed in 2015:
3 ex-TEPCO execs to be indicted Mon. over Fukushima nuclear disaster. The Mainichi, February 26, 2016 (Mainichi Japan) http://mainichi.jp/english/articles/20160226/p2a/00m/0na/005000c
TOKYO (Kyodo) -- Three former executives of Tokyo Electric Power Co. will be indicted Monday for allegedly failing to take measures to prevent the tsunami-triggered crisis at the Fukushima Daiichi nuclear complex, a lawyer in charge of the case said Friday.
The three, who will face charges of professional negligence resulting in death and injury, are Tsunehisa Katsumata, 75, chairman of TEPCO at the time, and two former vice presidents -- Sakae Muto, 65, and Ichiro Takekuro, 69....
The Mainichi reports that the Committee for the Inquest of Prosecution is charging the executives for ignoring a report received in June 2009 describing the plant's vulnerability to a tsunami measuring 15.7 meters. The Committee alleges the executives "failed to take pre-emptive measures knowing the risk of a major tsunami."