On 5 July 2012, the National Diet of Japan Fukushima Nuclear Accident Independent Investigation Commission (NAIIC) found that the causes of the accident had been foreseeable, and that the plant operator, Tokyo Electric Power Company (TEPCO), had failed to meet basic safety requirements such as risk assessment, preparing for containing collateral damage, and developing evacuation plans.
Pada tanggal 5 Juli 2012, Komisi Investigasi Independen Kecelakaan Nuklir Fukushima (NAIIC) menemukan bahwa penyebab kecelakaan tersebut telah lama diketahui, dan bahwa operator pabrik, Tokyo Electric Power Company (TEPCO), telah gagal memenuhi persyaratan keselamatan dasar seperti risiko Penilaian, persiapan untuk mendapatkan kerusakan bangunan, dan pengembangan rencana evakuasi.