- On July 5, 2012, the NAIIC found that the causes of the accident had been accountable.

- The plant operator had failed to meet basic safety requirements, such as risk assessment and preparing for collateral damage.

- On October 12, 2012 TEPCO admitted that it had failed to take necessary measures for fear of inviting lawsuits or protests against its nuclear plants.

NAIIC- Fukushima Nuclear Accident Independent Investigation Commission

TEPCO- Tokyo Electric Power Company

How is Fukushima HEI?