# 個人情報の保護に関する法律 / Act on the Protection of Personal Information — 第百二十三条 (Article 123) - Law: 個人情報の保護に関する法律 (Act on the Protection of Personal Information), 平成十五年法律第五十七号 - English title "Act on the Protection of Personal Information": Ministry of Justice translation - Kind: Act — the distinction between 法律 (Act), 政令 (Cabinet Order), 省令 (Ministerial Order) and 条例 (local ordinance) decides who may issue it and what it may say. - Provision: 第百二十三条 (Article 123)（匿名加工情報の取扱いに係る義務） — address `art-123` - Text in force since: 2026-10-01 - URL (the page that opens at this provision): https://japanlaw.org/ja/personal-information-protection-act/art-123 - Permanent URL (e-Gov law ID, never renamed): https://japanlaw.org/l/415AC0000000057/art-123 - Every provision below carries its address and both URLs on the line under it. - Japanese text: e-Gov 法令検索, Digital Agency (デジタル庁). English: as marked on each line below. Only the Japanese as published by the government has legal effect; the text below is a copy of it. Every English rendering below is a translation and says which kind: the Ministry of Justice's translation, or this site's machine translation, whose model and date the Sources list names. They are never merged and never substituted for one another. --- ### 第百二十三条（匿名加工情報の取扱いに係る義務） — (Obligations on the Handling of Anonymized Personal Information) caption: Ministry of Justice translation — Japanese Law Translation Database System art-123 · https://japanlaw.org/ja/personal-information-protection-act/art-123 · https://japanlaw.org/l/415AC0000000057/art-123 **第一項** 行政機関等は、匿名加工情報（行政機関等匿名加工情報を除く。以下この条において同じ。）を第三者に提供するときは、法令に基づく場合を除き、個人情報保護委員会規則で定めるところにより、あらかじめ、第三者に提供される匿名加工情報に含まれる個人に関する情報の項目及びその提供の方法について公表するとともに、当該第三者に対して、当該提供に係る情報が匿名加工情報である旨を明示しなければならない。 art-123/par-1 · https://japanlaw.org/ja/personal-information-protection-act/art-123/par-1 · https://japanlaw.org/l/415AC0000000057/art-123/par-1 Except cases based on laws and regulations, before providing anonymized personal information (excluding anonymized personal information an administrative entity holds; hereinafter the same applies in this Article) to a third party, an administrative entity must disclose the categories of information on an individual that is contained in anonymized personal information it will provide to the third party, and the means of providing this, and state to that third party explicitly to the effect that the information it will provide is anonymized personal information, pursuant to Order of the Personal Information Protection Commission. Ministry of Justice translation — Japanese Law Translation Database System **第二項** 行政機関等は、匿名加工情報を取り扱うに当たっては、法令に基づく場合を除き、当該匿名加工情報の作成に用いられた個人情報に係る本人を識別するために、当該個人情報から削除された記述等若しくは個人識別符号若しくは第四十三条第一項の規定により行われた加工の方法に関する情報を取得し、又は当該匿名加工情報を他の情報と照合してはならない。 art-123/par-2 · https://japanlaw.org/ja/personal-information-protection-act/art-123/par-2 · https://japanlaw.org/l/415AC0000000057/art-123/par-2 Except cases based on laws and regulations, in handling anonymized personal information, an administrative entity must neither obtain information relating to the identifier or the equivalent, individual identification codes, or information on the method of processing as performed under Article 43, paragraph (1) that has been deleted from the personal information, nor collate that anonymized personal information with other information, in order to identify a person identifiable by the personal information that was used to prepare the anonymized personal information. Ministry of Justice translation — Japanese Law Translation Database System **第三項** 行政機関等は、匿名加工情報の漏えいを防止するために必要なものとして個人情報保護委員会規則で定める基準に従い、匿名加工情報の適切な管理のために必要な措置を講じなければならない。 art-123/par-3 · https://japanlaw.org/ja/personal-information-protection-act/art-123/par-3 · https://japanlaw.org/l/415AC0000000057/art-123/par-3 An administrative entity must take necessary measures for proper management of the anonymized personal information in accordance with the criteria specified by Order of the Personal Information Protection Commission as necessary for preventing the leaking of anonymized personal information. Ministry of Justice translation — Japanese Law Translation Database System **第四項** 前二項の規定は、行政機関等から匿名加工情報の取扱いの委託（二以上の段階にわたる委託を含む。）を受けた者が受託した業務を行う場合について準用する。 art-123/par-4 · https://japanlaw.org/ja/personal-information-protection-act/art-123/par-4 · https://japanlaw.org/l/415AC0000000057/art-123/par-4 The provisions of the preceding two paragraphs apply mutatis mutandis if an administrative entity entrusts (including entrustment via two or more layers) a person to handle its anonymized personal information and that person performs those entrusted activities. Ministry of Justice translation — Japanese Law Translation Database System --- ## Cites - art-123/par-1: この条 → 個人情報の保護に関する法律 第百二十三条 (Article 123), art-123 — https://japanlaw.org/ja/personal-information-protection-act/art-123 · https://japanlaw.org/l/415AC0000000057/art-123 - art-123/par-2: 第四十三条第一項 → 個人情報の保護に関する法律 第四十三条第一項 (Article 43, paragraph (1)), art-43/par-1 — https://japanlaw.org/ja/personal-information-protection-act/art-43/par-1 · https://japanlaw.org/l/415AC0000000057/art-43/par-1 - art-123/par-4: 前二項 → 個人情報の保護に関する法律 第百二十三条第二項 (Article 123, paragraph (2)), art-123/par-2 — https://japanlaw.org/ja/personal-information-protection-act/art-123/par-2 · https://japanlaw.org/l/415AC0000000057/art-123/par-2 - art-123/par-4: 前二項 → 個人情報の保護に関する法律 第百二十三条第三項 (Article 123, paragraph (3)), art-123/par-3 — https://japanlaw.org/ja/personal-information-protection-act/art-123/par-3 · https://japanlaw.org/l/415AC0000000057/art-123/par-3 ## Cited by 2 provisions cite this one. No official source publishes this direction. - 個人情報の保護に関する法律 第百二十三条第一項（匿名加工情報の取扱いに係る義務） — https://japanlaw.org/ja/personal-information-protection-act/art-123/par-1 · https://japanlaw.org/l/415AC0000000057/art-123/par-1 - 個人情報の保護に関する法律 第百二十三条第四項（匿名加工情報の取扱いに係る義務） — https://japanlaw.org/ja/personal-information-protection-act/art-123/par-4 · https://japanlaw.org/l/415AC0000000057/art-123/par-4 --- ## Sources - e-Gov 法令検索, Digital Agency (デジタル庁) — 個人情報の保護に関する法律 — the text in force from 2026-10-01 (https://laws.e-gov.go.jp/law/415AC0000000057/20261001_507AC0000000070), retrieved 2026-10-10 - Japanese Law Translation Database System, Ministry of Justice (法務省) — Act on the Protection of Personal Information — Ministry of Justice translation (https://www.japaneselawtranslation.go.jp/en/laws/view/4241/tb), retrieved 2026-10-10 - This site's parser, version 190 — 個人情報の保護に関する法律 — structure, counts, cross-references and defined terms, computed 2026-10-10