The Japanese Government has provided the IAEA with a report that summarizes the events and highlights the progress related to recovery operations at the Fukushima Daiichi Nuclear Power Station. The IAEA provided its assessments, which are contained in full at the end of the report.

This assessment has been performed on aspects presented in the December 2024 report 'Events and highlights on the progress related to recovery operations at Fukushima Daiichi Nuclear Power Station'. It does not include recent developments that will be taken into consideration in a next report.

Preparation for the fuel debris retrieval from Unit 2 Primary Containment Vessel (PCV)

The IAEA acknowledges the progress that has been made in the preparatory work for the fuel debris retrieval from Unit 2 PCV, including the installation of the telescopic-type equipment to be used in the trial retrieval of the fuel debris.

Preparation for the spent-fuel removal from Unit 1 spent fuel pool

The IAEA acknowledges the steady progress of the preparatory work for spent fuel removal from Unit 1, including removal of overflowing rubble and installation of the lower structure.

Sea area monitoring results

The IAEA acknowledges that levels of radionuclides in the marine environment offshore FDNPS and other areas monitored on the east coast of Japan are low and relatively stable. For public reassurance, including with respect to the ALPS treated water discharges, the IAEA encourages the continuation of sea area monitoring. Furthermore, the IAEA considers that the ongoing data quality assurance programme which is in place is key to ensuring the accuracy and the quality of the results of the monitoring programme. It also enhances transparency and contributes to building stakeholders’ confidence.

Food products

Based on the information provided , the joint FAO/IAEA centre acknowledges that confidence in the safety of the food supply continues to be maintained by appropriate monitoring, regulatory action and public communication. Based on the information provided by Japan, the situation regarding the safety of the food supply, fishery and agricultural production continues to remain stable. Food restrictions continue to be revised and updated as necessary in line with food monitoring results. Many thousands of food samples were collected over the reporting period and this indicates continued vigilance of the authorities in Japan and their commitment to protecting consumers and trade.

1 October 2025

On 28 August 2025, Japan provided the IAEA with a copy of a report on the discharge record and the seawater monitoring results at the Fukushima Daiichi Nuclear Power Station during May, which the Ministry of Foreign Affairs has sent to all international Missions in Japan.

The report contains information on discharges from the subdrain and groundwater drain systems, as well as on groundwater bypassing conducted during the month of May. In both cases, in advance of the action, TEPCO analyzes the quality of the groundwater to be discharged and announces the results. These results confirm that the radiation level of sampled water are substantially below the operational targets set by TEPCO.

28 August 2025

On 16 July 2025, Japan provided the IAEA with a copy of a report on the discharge record and the seawater monitoring results at the Fukushima Daiichi Nuclear Power Station during April, which the Ministry of Foreign Affairs has sent to all international Missions in Japan.

The report contains information on discharges from the subdrain and groundwater drain systems, as well as on groundwater bypassing conducted during the month of April. In both cases, in advance of the action, TEPCO analyzes the quality of the groundwater to be discharged and announces the results. These results confirm that the radiation level of sampled water are substantially below the operational targets set by TEPCO.

16 July 2025

On 16 July 2025, Japan provided the IAEA with a copy of a report on the discharge record and the seawater monitoring results at the Fukushima Daiichi Nuclear Power Station during March, which the Ministry of Foreign Affairs has sent to all international Missions in Japan.

The report contains information on discharges from the subdrain and groundwater drain systems, as well as on groundwater bypassing conducted during the month of March. In both cases, in advance of the action, TEPCO analyzes the quality of the groundwater to be discharged and announces the results. These results confirm that the radiation level of sampled water are substantially below the operational targets set by TEPCO.

16 July 2025

On 19 June 2025, Japan provided the IAEA with a copy of a report on the discharge record and the seawater monitoring results at the Fukushima Daiichi Nuclear Power Station during February, which the Ministry of Foreign Affairs has sent to all international Missions in Japan.

The report contains information on discharges from the subdrain and groundwater drain systems, as well as on groundwater bypassing conducted during the month of February. In both cases, in advance of the action, TEPCO analyzes the quality of the groundwater to be discharged and announces the results. These results confirm that the radiation level of sampled water are substantially below the operational targets set by TEPCO.

19 June 2025

On 19 June 2025, Japan provided the IAEA with a copy of a report on the discharge record and the seawater monitoring results at the Fukushima Daiichi Nuclear Power Station during January, which the Ministry of Foreign Affairs has sent to all international Missions in Japan.

The report contains information on discharges from the subdrain and groundwater drain systems, as well as on groundwater bypassing conducted during the month of January. In both cases, in advance of the action, TEPCO analyzes the quality of the groundwater to be discharged and announces the results. These results confirm that the radiation level of sampled water are substantially below the operational targets set by TEPCO.

19 June 2025

On 19 June 2025, Japan provided the IAEA with a copy of a report on the discharge record and the seawater monitoring results at the Fukushima Daiichi Nuclear Power Station during December, which the Ministry of Foreign Affairs has sent to all international Missions in Japan.

The report contains information on discharges from the subdrain and groundwater drain systems, as well as on groundwater bypassing conducted during the month of December. In both cases, in advance of the action, TEPCO analyzes the quality of the groundwater to be discharged and announces the results. These results confirm that the radiation level of sampled water are substantially below the operational targets set by TEPCO.

19 June 2025

On 21 February 2025, Japan provided the IAEA with a copy of a report on the discharge record and the seawater monitoring results at the Fukushima Daiichi Nuclear Power Station during November, which the Ministry of Foreign Affairs has sent to all international Missions in Japan.

The report contains information on discharges from the subdrain and groundwater drain systems, as well as on groundwater bypassing conducted during the month of November. In both cases, in advance of the action, TEPCO analyzes the quality of the groundwater to be discharged and announces the results. These results confirm that the radiation level of sampled water are substantially below the operational targets set by TEPCO.

21 February 2025

On 1 February 2025, Japan provided the IAEA with a copy of a report on the discharge record and the seawater monitoring results at the Fukushima Daiichi Nuclear Power Station during October, which the Ministry of Foreign Affairs has sent to all international Missions in Japan.

The report contains information on discharges from the subdrain and groundwater drain systems, as well as on groundwater bypassing conducted during the month of October. In both cases, in advance of the action, TEPCO analyzes the quality of the groundwater to be discharged and announces the results. These results confirm that the radiation level of sampled water are substantially below the operational targets set by TEPCO.

1 February 2025

On 1 February 2025, Japan provided the IAEA with a copy of a report on the discharge record and the seawater monitoring results at the Fukushima Daiichi Nuclear Power Station during September, which the Ministry of Foreign Affairs has sent to all international Missions in Japan.

The report contains information on discharges from the subdrain and groundwater drain systems, as well as on groundwater bypassing conducted during the month of September. In both cases, in advance of the action, TEPCO analyzes the quality of the groundwater to be discharged and announces the results. These results confirm that the radiation level of sampled water are substantially below the operational targets set by TEPCO.

1 February 2025

On 28 November 2024, Japan provided the IAEA with a copy of a report on the discharge record and the seawater monitoring results at the Fukushima Daiichi Nuclear Power Station during August, which the Ministry of Foreign Affairs has sent to all international Missions in Japan.

The report contains information on discharges from the subdrain and groundwater drain systems, as well as on groundwater bypassing conducted during the month of August. In both cases, in advance of the action, TEPCO analyzes the quality of the groundwater to be discharged and announces the results. These results confirm that the radiation level of sampled water are substantially below the operational targets set by TEPCO.

28 November 2024

The Japanese Government has provided the IAEA with a report that summarizes the events and highlights the progress related to recovery operations at the Fukushima Daiichi Nuclear Power Station. The IAEA provided its assessments, which are contained in full at the end of the report.

This assessment has been performed on aspects presented in the June 2024 report 'Events and highlights on the progress related to recovery operations at TEPCO's Fukushima Daiichi Nuclear Power Stationn'. It does not include recent developments that will be taken into consideration in a next report.

Status towards the fuel debris retrieval from Primary Containment Vessel (PCV)

The IAEA acknowledges TEPCO’s continued work for the investigation inside the Unit 1 PCV and the fuel debris sampling inside the Unit 2 PCV, including the utilization of robot and drone technologies.

Preparation for fuel removal from Unit 2 spent fuel pool

The IAEA acknowledges the steady progress that has been made in the preparatory work for the removal of spent fuel from Unit 2 spent fuel pool, including shielding and concrete placement.

Sea area monitoring results

The IAEA acknowledges that the levels measured by Japan in the marine environment are low and relatively stable. For the purpose of public reassurance, the IAEA encourages the continuation of sea area monitoring. Furthermore, the IAEA considers that the ongoing data quality assurance programme which is in place is key for ensuring the accuracy and the quality of the results of the monitoring programme. It also enhances transparency and contributes to building stakeholders’ confidence.

Food products

Based on the information that has been made available, the Joint FAO/IAEA Centre understands that measures to monitor and respond to issues regarding radionuclide contamination of food are appropriate, and that the food supply chain is controlled effectively by the relevant authorities and that the public food supply is safe.

6 November 2024