| Japanese government | Convention on Nuclear Safety National Report of Japan for  the  Second  Extraordinary  Meeting | 
| Japanese government | Additional Report of the Japanese Government to the IAEA (Second Report) | 
| Japanese government | Report of Japanese Government to the IAEA Ministerial Conference on Nuclear Safety - The Accident at TEPCO's Fukushima Nuclear Power Stations - | 
| Investigation Committee on the Accident at the Fukushima Nuclear Power Stations of Tokyo Electric Power Company | Final Report | 
| Investigation Committee on the Accident at the Fukushima Nuclear Power Stations of Tokyo Electric Power Company | Interim Report | 
| National Diet of Japan Fukushima Nuclear Accident Independent Investigation Commission (NAIIC) | Reports | 
| TEPCO | The 5th Progress Report on the Investigation and Examination of Unconfirmed and Unresolved Issues on the Fukushima Daiich Nuclear Accident (Dec. 17, 2015) | 
| TEPCO | The 4th Progress Report on the Investigation and Examination of Unconfirmed and Unresolved Issues on the Development Mechanism of the Fukushima Daiichi Nuclear Accident | 
| TEPCO | Core conditions of Unit-1 to Unit-3 of the Fukushima Daiichi Nuclear Power Station | 
| TEPCO | TEPCO Reports Latest Findings of Technical Inquiry into How Accident at FUKUSHIMA Unfolded | 
| TEPCO | TEPCO Issues Progress Report on Inquiry into Unanswered Details of FUKUSHIMA | 
| TEPCO | First Progress Report: The Results of the Investigation and Examining on the Unidentified and Unsolved Matters of the Fukushima Nuclear Accident | 
| TEPCO | Fukushima Nuclear Accidents Investigation Report | 
| TEPCO | Fukushima Nuclear Accident Analysis Report | 
| TEPCO | Fukushima Nuclear Accident Analysis Report (Interim Report) | 
| IAEA | The Fukushima Daiichi Accident Report by the Director General | 
| JAEA | Reports related to the Fukushima Daiichi nuclear power station accident |