The Nuclear Waste Management Organization of Japan (NUMO) is engaged in the mission of implementing safe geological disposal of radioactive waste.
NUMO was established in October 2000 in accordance with the Designated Radioactive Waste Final Disposal Act, authorized by the Ministry of Economy, Trade and Industry (METI). NUMO is tasked with implementing final disposal -geological disposal- of high-level radioactive waste (HLW) and low-level radioactive waste containing long-lived nuclides (TRU waste) from Japanese nuclear fuel cycle.
Radioactive wastes for geological disposal
The spent fuel from nuclear power generation can be reused by reprocessing. After reprocessing, high-level radioactive waste (HLW) and low-level radioactive waste containing long-lived nuclides (TRU: Transuranic waste) are also generated as by-products and require safe management.
The reprocessing of spent fuel is used to separate re-usable uranium and plutonium from the waste. The resulting liquid containing high-level radioactive waste will be vitrified in a stainless steel container. This is called high-level radioactive waste (HLW) or vitrified waste. Additionally, different kinds of low-level radioactive wastes are generated in the reprocessing facility. NUMO is responsible for safe management of HLW and TRU waste which includes long-lived nuclides by implementing geological disposal.
In the geological disposal, radioactive waste will be emplaced in the stable deep underground deeper than 300 meters for long-term isolation of the waste from people and the environment.
Various disposal methods were studied to isolate the radioactive waste from people and the environment for a period of time extending over tens of thousands of years. The geological disposal is internationally recognized as a common concept for effective waste isolation by using natural capability of confining material in deep geological formations. Among international communities, Finland and Sweden have decided sites for geological disposal.
***Please see the FAQ for answers to our most frequently asked questions.
Handling of Personal Information
The Nuclear Waste Management Organization of Japan (NUMO) (hereafter “NUMO”) recognizes the importance of protecting personal information, has established a policy on the protection of personal information, and endeavors to appropriately protect personal information.
1 Collection of personal information
The personal information you provide is used to respond to your inquiries and provide you with relevant information such as public meetings. It is not used for any other purpose.
2 Management of Personal Information
The personal information you provide is handled appropriately by SPIRAL®, a Cloud Solutions service of Piped Bits Co., Ltd. For further information about information SPIRAL® asset management, visit its website
(https://www.pi-pe.co.jp/security/customer_ap.html) (Japanese only).
In addition, in the case of transferring the personal data of residents of the EEA (European Economic Area) from the EEA to another region including Japan, NUMO properly protects the collected information in accordance with the General Data Protection Regulation (hereafter “GDPR”).
3 Provision of Personal Information to Third Parties
NUMO does not disclose or provide your personal information to third parties without your consent. However, personal information may be provided in the case of the need to protect human life, body, or individual property and obtaining your consent is not feasible.
4 Outsourcing of Personal Information Handling
In the event of outsourcing some or all of the provided personal information to the extent necessary to achieve the purpose of use, we select contractors that sufficiently fulfill the required level of personal information protection and supervise and manage the contractors.
5 Retention Period of Personal Information
We retain personal information during the period necessary for the purpose of use.
6 Disclosure of Personal Information
Regarding your personal information, you may request to be notified of the purpose of use, the disclosure, correction, additional and deletion of your personal information, and the suspension of its use or provision to third parties (hereafter collectively referred to as "disclosure"). Please contact us through our contact form if you wish to request disclosure of your personal information. We may confirm your identity before such disclosure.
7 Rights Related to Personal Information Handling
Regarding the personal information you provide, you have the following rights in addition to the right of disclosure.
(a) Right to request restrictions on the use of your data
(b) Right to data portability
(c) Right to raise an objection
(d) Right to withdraw your agreement
(e) Right to raise an objection statement to the GDPR authority
8 Arbitrary Nature of Personal Information Provision and Case of Not Providing Personal Information
We collect your personal information to respond to your inquiries only after obtaining your consent. Please note that if your consent is not obtained, we will not be able to respond to your inquiries.
9 Automated Individual Decision-making about Personal Information
We do not make any automated individual decisions that could significantly affect you, including profiling, regarding the personal information you submit.
10 Cookies Policy of NUMO’s Website
Nuclear Waste Management Organization of Japan (NUMO)
・Contact us by phone or letter at the following if you do not have email.
Nuclear Waste Management Organization of Japan (NUMO)
Public Relations Department
Mita NN Bldg. 2F, 4-1-23 Shiba, Minato-ku, Tokyo 108-0014 Japan
+81-3-6371-4003 (10 am to 5 pm, Monday to Friday)