information

2025年9月29日: "Completion of the Discharge from Measurement/Confirmation Facility Tank Group B (4th Discharge for FY2025)" was disclosed.
Please click here for details
Reference material is available here
2025年9月16日: Release of Report from the International Atomic Energy Agency’s (IAEA) Review of Safety Related Aspects of Handling ALPS Treated Water (Fourth Review Mission after the Start of ALPS Treated Water Discharge)
Please click here for details
2025年9月11日: Commencement of the 4th discharge in FY2025
Please click here for details
Reference material is available here
2025年9月9日: "Pre-discharge analysis results of ALPS treated water in the measurement/confirmation facility tank group B" was disclosed.
Please click here for details
Reference material is available here
2025年8月26日: Comments following the 8th Inter-Ministerial Council for Steady Implementation of the Basic Policy on the handling of ALPS Treated Water and the 8th Inter-Ministerial Council for Contaminated Water, Treated Water and Decommissioning Issues
Please click here for details
2025年8月25日: "Completion of the Discharge from Measurement/Confirmation Facility Tank Group A (3rd Discharge for FY2025)" was disclosed.
Please click here for details
Reference material is available here
2025年8月7日: Commencement of the 3rd discharge in FY2025
Please click here for details
Reference material is available here
2025年8月5日: "Pre-discharge analysis results of ALPS treated water in the measurement/confirmation facility tank group A" was disclosed.
Please click here for details
Reference material is available here
2025年8月4日: "Completion of the Discharge from Measurement/Confirmation Facility Tank Group C(2nd Discharge for FY2025)" was disclosed.
Please click here for details
Reference material is available here
2025年8月4日: Fukushima Daiichi Nuclear Power Station Reevaluation of Nuclides Targeted for Measurement/Assessment during FY2025
Please click here for details
2025年8月1日: We suspended the discharge of ALPS treated water at 9:05 a.m. on July 30, 2025 as a precautionary measure in accordance with the issuance of a tsunami advisory/warning. The advisory/warning was lifted on July 31, and after confirming that there are no abnormalities in the facilities that have been suspended or related parameters on-site, we resumed the discharge into the sea at 10:59 a.m. on August 1.
2025年7月22日: We suspended the discharge of ALPS treated water at 7:13 p.m. on July 21, 2025 in accordance with the issuance of a tornado watch (Probability 2). We confirmed that there are no abnormalities in the facilities that have been suspended and resumed the discharge into the sea at 7:04 a.m. on July 22.
2025年7月14日: Commencement of the 2nd discharge in FY2025
Please click here for details
Reference material is available here
2025年7月10日: "Pre-discharge analysis results of ALPS treated water in the measurement/confirmation facility tank group C" was disclosed.
Please click here for details
Reference material is available here
2025年7月7日: Ambassador Extraordinary and Plenipotentiary of the Kingdom of Saudi Arabia to Japan and Minister for Reconstruction visited Fukushima Daiichi Nuclear Power Station (2025年6月25日)
Please click here for details
2025年5月30日: The International Atomic Energy Agency (IAEA) Task Force visited the Fukushima Daiichi Nuclear Power Station (2025年5月26日)
Please click here for details
2025年4月28日: "Completion of the Discharge from Measurement/Confirmation Facility Tank Group A(1st Discharge for FY2025)" was disclosed.
Please click here for details
Reference material is available here
2025年4月15日: The International Atomic Energy Agency (IAEA) and experts from third-party laboratories sampled ALPS treated water after dilution with seawater
Please click here for details
2025年4月10日: Commencement of the 1st discharge in FY2025
Please click here for details
Reference material is available here
2025年4月8日: "Pre-discharge analysis results of ALPS treated water in the measurement/confirmation facility tank group A" was disclosed.
Please click here for details
Reference material is available here
2025年3月31日: Regarding the Marine Organisms Rearing Tests using ALPS treated water, which have been conducted since 2022, all planned tests have completed and the rearing tests were terminated on March 31, 2025.
Please click here for details
2025年3月31日: "Completion of the Discharge from Measurement/Confirmation Facility Tank Group C (7th Discharge for FY2024)" was disclosed.
Please click here for details
Reference material is available here
2025年3月27日: Marine Organisms Rearing Tests using ALPS treated water have been conducted since 2022. Since all planned tests have completed, the rearing tests to have been finished as of March 31, 2025.
Please click here for details
2025年3月25日: Release of a Report on the International Atomic Energy Agency's (IAEA) Review Mission of Safety Related Aspects of Handling ALPS Treated Water (Third Review Mission after the Start of ALPS Treated Water Discharge)
Please click here for details
2025年3月18日: Visit to the Fukushima Daiichi Nuclear Power Station by President of the Federated States of Micronesia, H.E. Wesley W. Simina (2025年3月17日)
Please click here for details
2025年3月10日: Fukushima Daiichi Nuclear Power Station seventh discharge in FY2024 Commencement of the First stage of the discharge of ALPS treated water into the sea (discharge in two-stage)
Please click here for details
2025年3月6日: "Pre-discharge analysis results of ALPS treated water in the measurement/confirmation facility tank group C" was disclosed.
Please click here for details
Reference material is available here
2025年3月6日: The web page of "ALPS Treated Water, etc. Reduction Status"
Please click here for details
2025年2月19日: Visit to the Fukushima Daiichi Nuclear Power Station by IAEA Director General Rafael Mariano Grossi (2025年2月19日)
Please click here for details
2025年2月6日: Fukushima Daiichi Nuclear Power Station Dismantling of the J8/J9 area tanks
Please click here for details
2025年1月23日: FY2025 ALPS treated water discharge plan (draft)
Please click here for details
2024年12月26日: Minister of State for Science and Technology Policy, Minoru Kiuchi's visit to the Fukushima Daiichi Nuclear Power Station (2024年12月25日)
Please click here for details
2024年12月25日: Minister of Education, Culture, Sports, Science and Technology, Toshiko Abe's visit to the Fukushima Daiichi Nuclear Power Station (2024年12月21日)
Please click here for details
2024年12月17日: Prime Minister, Shigeru Ishiba's Visit to Fukushima Daiichi Nuclear Power Station (2024年12月14日)
Please click here for details
2024年12月13日: Site Visit to the Fukushima Daiichi Nuclear Power Station by the IAEA Task Force to conduct a safety review mission regarding the discharge of ALPS treated water (Third Review Mission after the Start of the Discharge) (2024年12月11日)
Please click here for details
2024年12月9日: Release of Radiological Environmental Impact Assessment Report for One Year after the Commencement of Discharge Regarding the Discharge of ALPS Treated Water into the Sea (Operation stage)
Please click here for details
2024年11月5日: "Completion of the Discharge from Measurement/Confirmation Facility Tank Group B (6th Discharge for FY2024)" was disclosed.
Please click here for details
Reference material is available here
2024年10月30日: Governor of Fukushima Prefecture, Masao Uchibori's Visit to Fukushima Daiichi Nuclear Power Station (2024年10月29日)
Please click here for details
2024年10月17日: Commencement of the 6th discharge in FY2024
Please click here for details
Reference material is available here
2024年10月15日: "Pre-discharge analysis results of ALPS treated water in the measurement/confirmation facility tank group B" was disclosed.
Please click here for details
Reference material is available here
2024年10月15日: "Completion of the Discharge from Measurement/Confirmation Facility Tank Group A (5th Discharge for FY2024)" was disclosed.
Please click here for details
Reference material is available here
2024年10月10日: Minister of Economy, Trade and Industry, Yoji Muto's Visit to Fukushima Daiichi Nuclear Power Station (2024年10月5日)
Please click here for details
2024年9月30日: Ambassador of the Republic of Korea visited Fukushima Daiichi Nuclear Power Station (2024年9月26日)
Please click here for details
2024年9月26日: Commencement of the 5th discharge in FY2024
Please click here for details
Reference material is available here
2024年9月24日: "Pre-discharge analysis results of ALPS treated water in the measurement/confirmation facility tank group A" was disclosed.
Please click here for details
Reference material is available here
2024年9月3日: The leaflet "Overview of the IAEA Report on Its Review of Safety Related Aspects of Handling ALPS Treated Water at Fukushima Daiichi Nuclear Power Station (Second Review Mission after the Start of the Discharge)" was released.
Please click here for details
2024年8月26日: "Completion of the Discharge from Measurement/Confirmation Facility Tank Group C (4th Discharge for FY2024)" was disclosed.
Please click here for details
Reference material is available here
2024年8月23日: Summary and review of one year of initiatives in the discharge of ALPS treated water into the sea
Please click here for details
2024年8月7日: Commencement of the 4th discharge in FY2024
Please click here for details
Reference material is available here
2024年8月5日: "Pre-discharge analysis results of ALPS treated water in the measurement/confirmation facility tank group C" was disclosed.
Please click here for details
Reference material is available here
2024年8月1日: Results from the FY2023 investigative analysis of the six nuclides targeted for monitoring in contaminated water prior to ALPS treatment
Reference material is available here
2024年7月19日: IAEA Confirms Tritium Level in Seawater from Kitaizumi Beach Far Below Japan’s Limit (2024年7月9日)
Please click here to the IAEA website
2024年7月18日: Release of Report from the International Atomic Energy Agency's (IAEA) Review of Safety Related Aspects of Handling ALPS Treated Water at Fukushima Daiichi Nuclear Power Station(Second Review Mission after the Start of ALPS Treated Water Discharge)
Please click here for details
2024年7月16日: "Completion of the Discharge from Measurement/Confirmation Facility Tank Group B (Third Discharge for FY2024)" was disclosed.
Please click here for details
Reference material is available here
2024年6月28日: Commencement of the third discharge in FY2024
Please click here for details
Reference material is available here
2024年6月27日: ALPS Treated Water Discharge Status Update
Please click here for details
2024年6月26日: "Pre-discharge analysis results of ALPS treated water in the measurement/confirmation facility tank group B" was disclosed.
Please click here for details
Reference material is available here.
2024年6月14日: Visit to Fukushima Daiichi Nuclear Power Station by the Ambassador of France to Japan, H. E. Mr. Philippe Setton (2024年6月7日)
Please click here for details
2024年6月12日: Q&A is updated.
Please click here for details
2024年6月4日: "Completion of the Discharge from Measurement/Confirmation Facility Tank Group A (Second Discharge for FY2024)" was disclosed.
Please click here for details
Reference material is available here
2024年5月30日: ALPS Treated Water Discharge Status Update
Please click here for details
2024年5月20日: Press Conference for Overseas Media (Sixth) regarding decommissioning work at the Fukushima Daiichi Nuclear Power Station was held. (2024年5月20日)
Please click here for details
2024年5月17日: Commencement of the second discharge in FY2024
Reference material is available here
Please click here for details
2024年5月15日: "Pre-discharge analysis results of ALPS treated water in the measurement/confirmation facility tank group A" was disclosed.
Please click here for details
Reference material is available here.
2024年5月7日: "Completion of the Discharge from Measurement/Confirmation Facility Tank Group C (First Discharge for FY2024)" was disclosed.
Please click here for details
Reference material is available here
2024年4月25日: ALPS Treated Water Discharge Status Update
Please click here for details
2024年4月25日: Site Visit to the Fukushima Daiichi Nuclear Power Station by the IAEA Task Force to conduct a safety review mission regarding the discharge of ALPS treated water (2024年4月24日)
Please click here for details
2024年4月24日: At 5:16 p.m. on April 24, we recommenced the discharge of ALPS treated water into the sea that had been suspended in conjunction with a loss of the on-site power system A, which occurred at 10:43 a.m. on the same day.
We have confirmed that there are no abnormalities with the facility’s operation.
Reference materials is available here
Please click here for the information (distributed at 4:10 p.m.)
2024年4月19日: Commencement of the first discharge in FY2024
Reference material is available here
Please click here for details
2024年4月17日: "Pre-discharge analysis results of ALPS treated water in the measurement/confirmation facility tank group C" was disclosed.
Please click here for details
Reference material is available here.
2024年4月15日: Visit to the Fukushima Daiichi Nuclear Power Station by the representatives of World Association of Nuclear Operators (WANO) (2024年4月12日)
Please click here for details
2024年4月11日: Visit to Fukushima Daiichi Nuclear Power Station by the Ambassador of Canada to Japan, H. E. Mr. Ian G. McKay (2024年4月8日)
Please click here for details
2024年3月18日: "Completion of the Discharge from Measurement/Confirmation Facility Tank Group B (Fourth Discharge)" was disclosed.
Please click here for details
Reference material is available here
2024年3月15日: At around 12:14 a.m. on March 15, an earthquake with its epicenter off the coast of Fukushima Prefecture in Japan occurred. The seismic intensity of 5-lower, that is the operational criteria to suspend the operation of the ALPS treated water dilution/discharge facility, was measured in Naraha Town, one of the towns^* where our power stations are located.
In response to this situation, we suspended the operation of the ALPS treated water dilution/discharge facility at 12:33 a.m., in accordance with the pre-defined operational procedures.

After conducting field patrol inspections, we confirmed that there was no abnormality on our facilities and related parameters, and that no leakage alarms had activated.
At 3:49 p.m., we commenced the ALPS treated water transfer process, and resumed the discharge into the sea.

*Fukushima Daiichi Nuclear Power Station is located in Okuma Town and Futaba Town. Fukushima Daini Nuclear Power Station is located in Tomioka Town and Naraha Town.
2024年3月14日: IAEA Director General Rafael Mariano Grossi’s visit to the Fukushima Daiichi Nuclear Power Station (2024年3月13日)
Please click here for details
2024年3月1日: The leaflet "Overview of the IAEA Report on Its Review of Safety Related Aspects of Handling ALPS Treated Water at Fukushima Daiichi Nuclear Power Station (First Review Mission after the Start of the Discharge)" was released.
Please click here for details
2024年2月29日: ALPS Treated Water Discharge Status Update
Please click here for details
2024年2月28日: Commencement of the fourth discharge for FY2023
Reference material is available here
Please click here for details
2024年2月26日: "Pre-discharge analysis results of ALPS treated water in the measurement/confirmation facility tank group B" was disclosed.
Please click here for details
Reference material is available here.
2024年2月22日: Primary Evaluation of 7th Open Call for Tritium Separation Technology
Please click here for details (Only in Japanese)
2024年2月19日: Visit to the Fukushima Daiichi Nuclear Power Station by the Ambassadors of the IAEA board member states to Vienna (2024年2月14日)
Please click here for details
2024年1月31日: Release of Report from the International Atomic Energy Agency's (IAEA) Review of Safety Related Aspects of Handling ALPS Treated Water at Fukushima Daiichi Nuclear Power Station(First Review Mission after the Start of ALPS Treated Water Discharge)
Please click here for details
2024年1月25日: ALPS Treated Water Discharge Status Update
Please click here for details
2024年1月17日: Press Conference for Overseas Media (Fifth) regarding decommissioning work at the Fukushima Daiichi Nuclear Power Station was held. (2024年1月16日)
Please click here for details
2024年1月12日: "Overarching Radiation-monitoring data Browsing System in the coastal ocean of Japan" has been revamped.
Please click here for details
2023年12月26日: ’Safety review by the IAEA’ is released.
Please click here for details
2023年12月25日: Revision of future monitoring plan for quick tritium measurements
Please click here for details
2023年12月22日: Video using computer graphics "Overview of discharge facility" was released.
Please click here for details
2023年12月21日: ALPS Treated Water Discharge Status Update
Please click here for details
2023年12月11日: Videos introducing "Treated Water Portal Site" were released.
Introduction of "Treated Water Portal Site"
Introduction of "Treated Water Portal Site" -Measurement/Confirmation Facility Conditions-
Introduction of "Treated Water Portal Site" -Dilution/Discharge Facility Conditions-
Introduction of "Treated Water Portal Site" -Sea Area Monitoring Results-
2023年11月30日: ALPS Treated Water Discharge Status Update
Please click here for details
For discharge plan and history
2023年11月29日: Q&A is updated
2023年11月29日: Video using computer graphics "Overview of transfer/dilution facility" was released.
Please click here for details
2023年11月21日: Visit to the Fukushima Daiichi Nuclear Power Station by the Ambassador of Czech Republic to H.E. Mr. Martin Klucar. (2023年11月20日)
Please click here for details
2023年11月20日: "Completion of the Discharge from Measurement/Confirmation Facility Tank Group A (Third Discharge)" was disclosed.
Please click here for details.
Reference material is available here.
2023年11月20日: Secondary Evaluation of 6th Open Call for Tritium Separation Technology
Please click here for details (Only in Japanese)
2023年11月17日: Visit to the Fukushima Daiichi Nuclear Power Station by the Ambassador of Ireland to Japan, H.E. Mr. Damien Cole (2023年11月8日)
Please click here for details
2023年11月9日: Visit to the Fukushima Daiichi Nuclear Power Station by the International Commission on Radiological Protection (ICRP) (2023年11月2日)
Please click here for details
2023年11月2日: Commencement of the Second Stage of the third discharge for FY2023
Reference material is available here
Please click here for details
2023年11月1日: Analysis Results for the Water Stored in the Discharge Vertical Shaft (Upper-stream Storage) as Part of the First Stage of the Third Discharge in FY2023
Reference material is available here
Please Click here for the details
2023年10月31日: Commencement of the First Stage of the third discharge for FY2023
Reference material is available here
2023年10月30日: Facility inspection results and preparations for the First Stage of the third discharge of FY2023
Please click here for details
2023年10月30日: Summary of the Press Conference for Overseas Media (Fourth) which was held and disclosed on our website on October 4, 2023 is uploaded.
Please click here for details
2023年10月26日: ALPS Treated Water Discharge Status Update
Please click here for details
For discharge plan and history
2023年10月25日: Site visit to the Fukushima Daiichi Nuclear Power Station by the IAEA Task Force to conduct a review mission regarding the discharge of ALPS treated water
Please click here for details
2023年10月23日: "Completion of the Discharge from Measurement/Confirmation Facility Tank Group C (Second Discharge)" was disclosed.
Please click here for details
Reference material is available here.
2023年10月20日: Visit to the Fukushima Daiichi Nuclear Power Station by IAEA Deputy Director General Lydie Evrard.
Please click here for details
2023年10月19日: "Pre-discharge analysis results of ALPS treated water in the measurement/confirmation facility tank group A" was disclosed.
Please click here for details.
Reference material is available here.
2023年10月12日: International Atomic Energy Agency (IAEA) attended the sampling for the second discharge of ALPS treated water (Second Stage) (2023年10月5日)
Please click here for details
2023年10月12日: International Atomic Energy Agency (IAEA) attended the sampling for the second discharge of ALPS treated water (First Stage) (2023年10月3日)
Please click here for details
2023年10月4日: Press Conference for Overseas Media (Fourth) was held.
Please click here for details
2023年9月28日: ALPS Treated Water Discharge Status Update
Please click here for details
2023年9月22日: TEPCO Shorts ALPS treated water #10 "What will we demonstrate by marine organisms rearing test?"
Please click here for the movie
2023年9月21日: Analysis Results of ALPS Treated Water Sampled from the Measurement/Confirmation Facility Tank Group C
Please click here for details
2023年9月14日: Primary Evaluation of 6th Open Call for Tritium Separation Technology
Please click here for details (Only in Japanese)
2023年9月11日: Completion of the Discharge from Measurement/Confirmation Facility Tank Group B (First Discharge)
Please click here for details
2023年9月11日: TEPCO Shorts ALPS treated water #09 "Would there be an impact on the public and the environment?"
Please click here for the movie
2023年9月1日: Tritium concentration analysis results from sea area monitoring (within 3km of the power station (near the discharge outlet))
Please click here for details
2023年8月25日: Tritium concentration analysis results of seawater pipes and sea area monitoring pertaining to ALPS treated water discharge into the sea
Please click here for details
2023年8月24日: Commencement of the Discharge of ALPS Treated Water into the Sea
Please click here for details
2023年8月24日: Commencement of the Initial Discharge of ALPS Treated Water (Stage 2)
Please click here for details
2023年8月24日: Treated Water Portal Site has been revamped
2023年8月23日: Commencement of preparations for the initial discharge of ALPS-treated water (First Stage)
Please click here for details
2023年8月22日: Sea Area Monitoring Plan (revised in August, 2023)
Please click here for details (Only in Japanese)
2023年8月22日: Commencement of the Discharge of Water Treated with Multi-nuclide Removal Equipment (ALPS Treated Water) into the Sea
Please click here for details
2023年8月22日: Remarks about the sixth meeting of the Inter-Ministerial Council concerning the Continuous Implementation of the Basic Policy on Handling of ALPS Treated Water
Please click here for details
2023年8月21日: Visit to the Fukushima Daiichi Nuclear Power Station by the Prime Minister Fumio Kishida (2023年8月20日)
Please click here for details
2023年7月21日: Summary of the Third Press Conference for Overseas Media held on July 21, 2023 is uploaded.
Please click here for details
2023年7月7日: Certificate of Completion Received for the Pre-Use Inspections of ALPS Treated Water Dilution/Discharge Facility and Related Facilities at the Fukushima Daiichi Nuclear Power Station
Please click here for details
2023年7月6日: IAEA Director General Rafael Mariano Grossi’s visit to the Fukushima Daiichi Nuclear Power Station (2023年7月5日)
Please click here for details
2023年7月4日: Release of Comprehensive Report on the International Atomic Energy Agency’s safety review of the ALPS Treated Water
Please click here for details
2023年6月26日: Work in removal of the shield arrival tube and installation of the discharge outlet caisson upper lid
Please click here for details
2023年6月23日: Visit to Fukushima Daiichi Nuclear Power Station by the Ambassador of the Republic of the Marshall Islands to Japan, H. E. Mr. Alexander Carter BING (2023年6月19日)
Please click here for details (Only in Japanese)
2023年6月19日: Visit to the Fukushima Daiichi Nuclear Power Station by the Delegation of Taiwanese Nuclear Experts (2023年6月16日)
Please click here for details
2023年6月16日: Pamphlet "Marine Organisms Rearing Test using ALPS Treated Water" was published
Please click here for details
2023年6月13日: Visit to the Fukushima Daiichi Nuclear Power Station by the President of the Republic of Palau, H.E. Mr. Surangel S. WHIPPS, Jr. (2023年6月13日)
Please click here for details
2023年6月13日: Site visit to the Fukushima Daiichi Nuclear Power Station by IAEA officials to observe pre-service inspections of the facilities related to the discharge of ALPS treated water into the sea (2023年5月24日 and 25)
Please click here for details
2023年6月9日: Visit to the Fukushima Daiichi Nuclear Power Station by the Ambassador of the Dominican Republic to Japan, H. E. Mr. Robert TAKATA (2023年5月31日)
Please click here for details
2023年6月6日: Down-stream storage after completion of water filling
Please click here for details
2023年6月2日: Site visit to the Fukushima Daiichi Nuclear Power Station by the IAEA Task Force to conduct a comprehensive review mission regarding the planned discharge of ALPS treated water (2023年6月2日)
Please click here for details
2023年5月30日: Pamphlet "Report of Assessment of Radiological Impact on Public and Environment Regarding the Discharge of ALPS Treated Water into the Sea (Construction stage)" (as of May 2023) in below four languages were revised
Please click here for details in Simplified Chinese
Please click here for details in Traditional Chinese
Please click here for details in Traditional Chinese, Hong Kong
Please click here for details in Korean
2023年5月22日: Pamphlet "Report of Assessment of Radiological Impact on Public and Environment Regarding the Discharge of ALPS Treated Water into the Sea (Construction stage)" (as of May 2023) was revised
Please click here for details
2023年5月10日: Approval of the Application for Approval to Amend the Implementation Plan Regarding the Handling of ALPS Treated Water at Fukushima Daiichi Nuclear Power Station by the Nuclear Regulation Authority
Please click here for details
2023年4月28日: A special page for ALPS treated water launched
Please click here for the site
2023年4月24日: Partial Revision of the "Application Documents for Approval to Amend the Implementation Plan for Fukushima Daiichi Nuclear Power Station Specified Nuclear Facility" Regarding the Handling of ALPS Treated Water
Click here for a list of announcements
2023年4月3日: "Overall view of ALPS Treated Water Dilution/Discharge Facility (Plan schematic diagram)" in below four languages were released
Please click here for Simplified Chinese version
Please click here for Traditional Chinese version
Please click here for Traditional Chinese, Hong Kong version
Please click here for Korean version
2023年3月15日: Monitoring points for fish and seaweed have been added to Sea Area Monitoring page
Please click here for details.
Marine Organisms Rearing Test page is available
Please click here for details.
2023年3月14日: Video using computer graphics -Mechanism for Purification by "Multi-nuclide removal equipment (ALPS)"- in below four languages was released.
Please click here for watching Simplified Chinese version.
Please click here for watching Traditional Chinese version.
Please click here for watching Traditional Chinese, Hong Kong version.
Please click here for watching Korean version.
2023年3月13日: Overarching Radiation monitoring data Browsing System around Japan is available
Please click here for details.
2023年3月10日: Schematic diagram of ALPS Treated Water Dilution/Discharge Facility was published
Please click here for details.
2023年3月9日: Second press briefing for overseas media on the decommissioning efforts at the Fukushima Daiichi Nuclear Power Station
Please click here for details.
2023年3月9日: Hong Kong Traditional Chinese version launched
2023年2月20日: Partial Revision of the "Application Documents for Approval to Amend the Implementation Plan for Fukushima Daiichi Nuclear Power Station Specified Nuclear Facility" Regarding the Handling of ALPS Treated Water
Please click here for details.
Please click here for Radiological Environmental Impact Assessment Report Regarding the Discharge of ALPS Treated Water into the Sea (Construction stage / Revised version) <Corrected version of June 16, 2023>
2023年2月14日: Partial Revisions of the "Application Documents for Approval to Amend the Implementation Plan for Fukushima Daiichi Nuclear Power Station Specified Nuclear Facility" Regarding the Handling of ALPS Treated Water
Please click here for details.
Please click here for Radiological Environmental Impact Assessment Report Regarding the Discharge of ALPS Treated Water into the Sea (Construction stage) (From 272 page)
2023年2月14日: Back filling of discharge outlet caisson (Follow-up report)
Please click here for details.
2023年2月13日: Video using computer graphics -Mechanism for Purification by "Multi-nuclide removal equipment (ALPS)"- was released
Please click here for details.
2023年1月13日: (Comment)
Comments following the 5th meeting of the Inter-Ministerial Council concerning the Continuous Implementation of the Basic Policy on Handling of ALPS Treated Water
Please click here for details.
2022年12月23日: Pamphlet "Report of Assessment of Radiological Impact on Public and Environment Regarding the Discharge of ALPS Treated Water into the Sea (Construction stage)" (as of December 2022) in below four languages was published.
Please click here for details in Simplified Chinese.
Please click here for details in Traditional Chinese.
Please click here for details in Traditional Chinese, Hong Kong
Please click here for details in Korean.
2022年12月20日: The OECD/NEA and nuclear regulatory authorities from various countries visited Fukushima Daiichi Nuclear Power Station
Please click here for details.
2022年12月16日: Pamphlet "Report of Assessment of Radiological Impact on Public and Environment Regarding the Discharge of ALPS Treated Water into the Sea (Construction stage)" (as of December 2022) was revised.
Please click here for details.
2022年12月8日: Back filling of discharge outlet caisson Fukushima Daiichi Nuclear Power Station
Please click here for details.
2022年11月18日: Installation of discharge outlet caisson Fukushima Daiichi Nuclear Power Station
Please click here for details.
2022年11月16日: Inspection at the Fukushima Daiichi Nuclear Power Station by the IAEA officials for the Second Review of the Safety Aspects of ALPS Treated Water
Please click here for details.
Please click here for a summary document.
2022年11月14日: Submission of the "Application Documents for Approval to Amend the Implementation Plan for Fukushima Daiichi Nuclear Power Station Specified Nuclear Facility" Regarding the Handling of ALPS Treated Water
Please click here for details.
Please click here for Radiological Environmental Impact Assessment Report Regarding the Discharge of ALPS Treated Water into the Sea (Construction stage) (From 218 page)
2022年11月11日: Governor of Fukushima prefecture, Uchibori Masao's visit to the Fukushima Daiichi Nuclear Power Station
Please click here for details.
2022年11月11日: As a part of joint project :Collecting samples of seawater, etc. by IAEA and other authorities
Please click here for details.
2022年11月9日: Overall View of ALPS Treated Water Dilution/Discharge Facility (schematic diagram) was published.
Please click here for details.
2022年11月7日: UK nuclear industry representatives' visit to the Fukushima Daiichi Nuclear Power Station
Please click here for details.
2022年11月2日: Collection of seawater, etc. conducted with IAEA and other authorities
Please click here for details.
Please click here for IAEA Press Release.
2022年10月19日: The third observation of the sampling of ALPS treated water by IAEA review team at the Fukushima Daiichi Nuclear Power Station
Please click here for details.
2022年10月3日: Explanation Using the ALPS Treated Water Sample Bottle Given during Visits to the Fukushima Daiichi Nuclear Power Station
Please click here for details.
Please click here for details in Simplified Chinese.
Please click here for details in Traditional Chinese.
Please click here for details in Traditional Chinese, Hong Kong
Please click here for details in Korean.
2022年9月28日: Minister for Reconstruction Kenya Akiba's visit to the Fukushima Daiichi Nuclear Power Station
Please click here for details.
2022年9月16日: The leaflet "Overview of IAEA Review of Safety Related Aspects of Handling ALPS Treated Water at Fukushima Daiichi Nuclear Power Station" was released.
Please click here for details.
2022年8月30日: On the Japanese Government’s Summary of the "Approach to Strengthening and Expansion of Measures in the Handling of ALPS Treated Water"
Please click here for details.
2022年8月22日: METI Minister Yasutoshi Nishimura’s visit to the Fukushima Daiichi Nuclear Power Station
Please click here for details.
2022年8月17日: Pamphlet "Report of Assessment of Radiological Impact on Public and Environment Regarding the Discharge of ALPS Treated Water into the Sea (Design stage)" (as of June 2022) in below three languages was published.
Please click here to see it for Simplified Chinese.
Please click here to see it for Traditional Chinese.
Please click here to see it for Korean.
Reference: Please click here it for English. (Published in 2022年6月30日)
2022年8月15日: Q&A on "Handling of Treated Water" has been added.
Please click here for details.
2022年8月3日: Installation of ALPS Treated Water Dilution/Discharge Facility and Related Facilities Given the Approval of the Amendment of the Implementation Plan and the Prior Consent based on the Agreement to Ensure Safety in Decommissioning
Please click here for details.
2022年8月2日: Prior Consent of Fukushima Prefecture, Okuma Town, and Futaba Town Regarding the Installation of ALPS Treated Water Dilution/Discharge Facilities, etc. at Fukushima Daiichi Nuclear Power Station based on the Agreement to Ensure Safety in Decommissioning
Please click here for details.
2022年7月29日: Irish Ambassador to Japan, H. E. Mr. Paul Kavanagh’s visit to the Fukushima Daiichi Nuclear Power Station
Please click here for details.
2022年7月22日: Approval of the Application for Approval to Amend the Implementation Plan Regarding the Handling of ALPS Treated Water at Fukushima Daiichi Nuclear Power Station by the Nuclear Regulation Authority
Please click here for details.
2022年7月19日: Chief Cabinet Secretary, Hirokazu Matsuno’s visit to the Fukushima Daiichi Nuclear Power Station
Please click here for details.
2022年7月15日: Partial Revision (third revision) of the "Application Documents for Approval to Amend the Implementation Plan for Fukushima Daiichi Nuclear Power Station Specified Nuclear Facility" Regarding the Handling of ALPS Treated Water
Please click here for details.
Please click here for Radiological Impact Assessment Report Regarding the Discharge of ALPS Treated Water into the Sea (Design stage / Revised version) (From 241 page)
2022年7月12日: The document of "Revision of the Radiological Impact Assessment Report Regarding the Discharge of ALPS Treated Water into the Sea (Design stage*)" in below three languages was published.
Please click here to see it for Simplified Chinese.
Please click here to see it for Traditional Chinese.
Please click here to see it for Korean.
Reference: Please click here it for English. (Published in 2022年4月28日)
2022年6月30日: Pamphlet "Report of Assessment of Radiological Impact on Public and Environment Regarding the Discharge of ALPS Treated Water into the Sea (Design stage)" (as of June 2022) was revised.
Please click here for details.
2022年6月1日: The document of "New Definition of ALPS Treated Water and the Amount of Tritium in Water being stored in Tanks" in below three languages was published.
Please click here to see it for Simplified Chinese.
Please click here to see it for Traditional Chinese.
Please click here to see it for Korean.
Reference: Please click here it for English. (Published in 2021年4月27日)
2022年5月19日: IAEA Director General Grossi’s visit to the Fukushima Daiichi Nuclear Power Station
Please click here for details.
2022年5月18日: Nuclear Regulation Authority Compiles Draft of Review Report
Please click here for details.
2022年5月13日: Partial Revision (second revision) of the "Application Documents for Approval to Amend the Implementation Plan for Fukushima Daiichi Nuclear Power Station Specified Nuclear Facility" Regarding the Handling of ALPS Treated Water
Please click here for details.
Please click here for Radiological Impact Assessment Report Regarding the Discharge of ALPS Treated Water into the Sea (Design stage / Revised version)
2022年5月2日: Release of Results from International Atomic Energy Agency (IAEA) Review of Safety Related Aspects of the Handling of ALPS Treated Water
Please click here for details.
2022年4月28日: Revision of the "Application Documents for Approval to Amend the Implementation Plan for Fukushima Daiichi Nuclear Power Station Specified Nuclear Facility" Regarding the Handling of ALPS Treated Water
Please click here for details.
Please click here for Radiological Impact Assessment Report Regarding the Discharge of ALPS Treated Water into the Sea (Design stage / Revised version) (Partially revised on May 13,2022)
2022年4月28日: The result of public comments for the "Radiological Impact Assessment Report Regarding the Discharge of ALPS Treated Water into the Sea (Design stage)"
Please click here for details.
2022年3月28日: Taiwanese Government officials’ visit to the Fukushima Daiichi Nuclear Power Station.
Please click here for details.
2022年3月25日: Link were added.
Please click here for details. (IAEA Website)
2022年2月16日: IAEA review team conducts field inspection during safety review of ALPS treated water at the Fukushima Daiichi Nuclear Power Station
Please click here for details.
2022年2月7日: Pamphlet "Report of Assessment of Radiological Impact on Public and Environment Regarding the Discharge of ALPS Treated Water into the Sea (Design stage)" (as of December 2021) was published.
Please click here to see it.
Please click here to see it for Simplified Chinese.
Please click here to see it for Traditional Chinese.
Please click here to see it for Korean.
2021年12月28日: (Comment) Regarding the Government’s Action Plan concerning the Continuous Implementation of the Basic Policy on Handling of ALPS Treated Water
Please click here to see it.
2021年12月21日: Submission of the "Application Documents for Approval to Amend the Implementation Plan for Fukushima Daiichi Nuclear Power Station Specified Nuclear Facility" Regarding the Handling of ALPS Treated Water
Please click here for details.
Please click here for Radiological Impact Assessment Report Regarding the Discharge of ALPS Treated Water into the Sea (Design stage) (From 94 page)
2021年12月3日: The Nuclear Regulation Authority Chairman Fuketa’s visit to the Fukushima Daiichi Nuclear Power Station
Please click here for details.
2021年11月30日: Governor of Fukushima prefecture, Uchibori Masao’s visit to the Fukushima Daiichi Nuclear Power Station
Please click here for details.
2021年11月19日: H.E. Ms. Julia Margaret Longbottom, British Ambassador to Japan’s visit to the Fukushima Daiichi Nuclear Power Station
Please click here for details.
2021年11月17日: "Radiological Impact Assessment Report Regarding the Discharge of ALPS Treated Water into the Sea (Design stage)"
Please click here to see the overview version.
Please click here to see it.
Please click here to see the video.
Please click here to see Guidelines for the Submission of Public Comments.
2021年11月17日: Visit to the Fukushima Daiichi Nuclear Power Station by the IAEA review mission to assess the safety of ALPS treated water
Please click here for details.
2021年10月17日: Prime Minister, Fumio Kishida’s visit to the Fukushima Daiichi Nuclear Power Station
Please click here for details.
2021年10月17日: State Minister of Economy, Trade and Industry, Masahiro Ishii’s visit to the Fukushima Daiichi Nuclear Power Station
Please click here for details.
2021年10月11日: Minister of Economy, Trade and Industry, Koichi Hagiuda's visit to the Fukushima Daiichi Nuclear Power Station
Please click here for details.
2021年8月25日: Status of Review Regarding the Handling of ALPS Treated Water at the Fukushima Daiichi Nuclear Power Station
Please click here to see it.
2021年8月24日: (Comment) The Government’s "Tentative Measures" Regarding Handling of ALPS Treated Water
Please click here to see it.
2021年8月6日: WATER MANAGEMENT AT FUKUSHIMA DAIICHI
Please click here to see it.
2021年7月30日: Establishment of ALPS Treated Water Program Department
Please click here to see it.
2021年7月29日: Fukushima Daiichi Nuclear Power Station Status of Review Regarding the Rearing Test of Marine Organisms
Please click here to see it.
2021年7月12日: Status of Review Regarding the Sea Discharge Facility Relevant for the Handling of ALPS Treated Water
Please click here to see it.
2021年7月9日: International Atomic Energy Agency (IAEA) Review of the Handling of Water Treated with Multi-nuclide Removal Equipment at the Fukushima Daiichi Nuclear Power Station.
Please click here to see it.
2021年6月24日: Results of Secondary Treatment Performance Tests for ALPS Treated Water (Third-Party Assessment)
Please click here to see it.
2021年6月24日: Measures to Improve the Reliability of ALPS Outlet Sampling Tanks (Including Flanged Tanks)
Please click here to see it.
2021年5月27日: Open call for "Technology to separate Tritium from Water Treated with Multi-Nuclide Removal Equipment (ALPS)" has started.
Please click here to see it.
Commencement of Open Call for Tritium Separation Technology in Cooperation with a Third-Party
Please click here to see it.
Facilities Necessary to Perform Thorough Measurements/Assessments of Radiation Concentrations
Please click here to see it.
2021年4月28日: Pamphlet "What is Tritium?" was published.
Please click here to see it.
Please click here to see it for Simplified Chinese.
Please click here to see it for Traditional Chinese.
Please click here to see it for Korean.
2021年4月27日: New Definition of ALPS Treated Water and the Amount of Tritium in Water being stored in Tanks
Please click here to see it.
2021年4月16日: TEPCO Holdings’ Action in Response to the Government’s Policy on the Handling of ALPS Treated Water from the Fukushima Daiichi Nuclear Power Station
Please click here to see it.
2021年4月13日: (Comment) Determination of Government’s Basic Policy on the Handling of ALPS Treated Water from the Fukushima Daiichi Nuclear Power Station
Please click here to see it.
2021年4月13日: Government’s Basic Policy on handling of ALPS treated water at the Tokyo Electric Power Company Holdings’ Fukushima Daiichi Nuclear Power Station
Please click here to see it.
2021年4月13日: We have leveraged various opportunities to hear the opinions of regional residents and other members of society since the publication of our Draft Study on March 24, 2020.
The following is a summary of TEPCO’s thinking in regards to the primary issues touched on in these opinions.
Please click here to see it.
2020年12月24日: "Results from secondary treatment performance confirmation tests on water treated with multi-nuclide removal equipment (final report)" is posted.
Please click here to see it.
2020年11月26日: "Storage amounts of ALPS-treated water* broken down by the sums of ratios of concentrations required by law" is updated.
Please click here to see it.
2020年11月26日: "Results from secondary treatment performance confirmation tests on water treated with multi-nuclide removal equipment (J1-G group) (follow-up report)" is posted.
Please click here to see it.
2020年11月16日: "Results from secondary treatment performance confirmation tests on water treated with multi-nuclide removal equipment (follow-up report)" is posted.
Please click here to see it.
2020年10月28日: Q&A page is revised.
2020年10月15日: " Results of tests to confirm the performance of secondary treatment of water treated with multi-nuclide removal equipment (Update)" is posted.
Please click here to see it.
2020年9月15日: Performance confirmation tests of the secondary treatment of water treated with multi-nuclide removal equipment began.
Please click here for details.
2020年9月14日: Materials on the investigation into the deviation between gross beta and primary 7 nuclide totals for water treated with multi-nuclide removal equipment, etc. (treated water*) are posted.
Please click here to see the material dated on January 17, 2019
Please click here to see the material dated on June 17, 2019
Please click here to see the material dated on March 16, 2020
Please click here to see the material dated on September 14, 2020
2020年9月10日: "Performance confirmation tests of the secondary treatment of water treated with multi-nuclide removal equipment" is posted.
Please click here to see it.
2020年8月27日: "<ALPS-Treated Water> Updated Data for Storage Amounts broken down by the Sum of Ratios for Concentrations Required by Law" is posted.
Please click here to see it.
2020年8月11日: Treatment of Sr-treated water was completed on August 8.
Please click here for details.
2020年7月30日: "Tank Reuse Policy in light of the Results of Analysis of Water in Tanks to be repurposed" is posted.
Please click here to see it.
2020年7月3日: Q&A page is revised.
2020年6月19日: "Stabilization and Treatment of Waste generated by Contaminated Water Purification and Treatment Facilities" is posted.
Please click here to see it.
2020年4月3日: Q&A page is revised.
2020年3月27日: "Slurry Stabilization Treatment System Installation Plan Status" is posted.
Please click here to see it.
2020年3月24日: TEPCO draft study responding to the "Subcommittee Report on Handling ALPS Treated Water" is posted.
Click here for details.
2020年3月16日: Materials on the investigation into the deviation between gross beta and primary 7 nuclide totals for water treated with multi-nuclide removal equipment, etc. (treated water*) are posted.
Please click here to see the material dated on January 17, 2019
Please click here to see the material dated on June 17, 2019
Please click here to see the material dated on March 16, 2020
2020年3月11日: Notation of "Water treated with multi-nuclide removal equipment, etc." was revised depending upon radioactive concentration levels.
2020年2月10日: "The Subcommittee on Handling of the ALPS Treated Water Report" was published.
Please click here to see it.
2020年2月6日: "Results of Internal Inspection of Storage Tanks for Water treated with Multi-nuclide Removal Equipment" is posted.
Please click here to see the material.
2020年2月3日: The briefing about current status of ALPS treated water was held for diplomatic corps in Tokyo.
Click here for details.
2020年1月31日: The 17th Subcommittee on Handling ALPS Treated Water was held.
Please click here to see the presentation materials from TEPCO Holdings.
2020年1月30日: "Plan for repurposing Strontium-treated water tanks for ALPS-treated water tanks" is posted.
Please click here to see the material.
2019年12月23日: The 16th Subcommittee on Handling ALPS Treated Water was held.
Click here for details.
2019年11月21日: The briefing about current status of ALPS treated water was held for diplomatic corps in Tokyo.
Click here for details.
2019年11月18日: The 15th Subcommittee on Handling ALPS Treated Water was held.
2019年10月31日: Results of Internal Inspection of ALPS-Treated Water Storage Tanks.
Click here for more information.
2019年10月30日: "Map of entire site" and "Examination of future site utilization" were added on "Treated Water Storage" page.
2019年9月27日: The 14th Subcommittee on Handling ALPS Treated Water was held.
Click here for outline.
2019年9月26日: "Treated Water Storage" section added
2019年9月4日: The briefing about current status of ALPS treated water was held for diplomatic corps in Tokyo.
Click here for details.
2019年8月9日: The 13th Subcommittee on Handling ALPS Treated Water was held.
Click here for the outline.
2019年7月29日: Water amount and storage capacity of tanks for the Units 1-4 was changed as the calculating method which had been different for each tank area was unified.
Click here for details.
2019年4月25日: Results of Internal Condition Survey and Internal Surface Inspection of Strontium-Treated Water Welded Tanks.
Click here for more information.
2019年3月27日: The transfer of treated water from the Advanced Liquid Processing System (ALPS) stored in bolted flange tanks to welded tanks was completed.
Click here for details.
2019年2月28日: Available for smartphones
2019年1月21日: English version launched