# 個人情報の保護に関する法律 / Act on the Protection of Personal Information — 第四条 (Supplementary Provisions, Article 4)

- 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: 第四条 (Supplementary Provisions, Article 4)（通知に関する経過措置） — address `suppl-4151-57/art-4`
- Text in force since: 2026-10-01
- URL (the page that opens at this provision): https://japanlaw.org/en/personal-information-protection-act/suppl-4151-57/art-4
- Permanent URL (e-Gov law ID, never renamed): https://japanlaw.org/l/415AC0000000057/suppl-4151-57/art-4
- 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.

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### 第四条（通知に関する経過措置） — Transitional Measures Concerning Notification
<sup>caption: machine translation, not official</sup>
<sup>suppl-4151-57/art-4 · https://japanlaw.org/en/personal-information-protection-act/suppl-4151-57/art-4 · https://japanlaw.org/l/415AC0000000057/suppl-4151-57/art-4</sup>

**第一項**  第二十三条第二項の規定により本人に通知し、又は本人が容易に知り得る状態に置かなければならない事項に相当する事項について、この法律の施行前に、本人に通知されているときは、当該通知は、同項の規定により行われたものとみなす。
<sup>suppl-4151-57/art-4/par-1 · https://japanlaw.org/en/personal-information-protection-act/suppl-4151-57/art-4/par-1 · https://japanlaw.org/l/415AC0000000057/suppl-4151-57/art-4/par-1</sup>
If matters corresponding to those that must be notified to the identifiable person or made readily accessible to the identifiable person under Article 23, paragraph (2) have been notified to the identifiable person before the enforcement of this Act, that notification is deemed to have been made under that paragraph.
<sup>machine translation, not official</sup>

## Cited by

1 provision cites this one. No official source publishes this direction.

- 個人情報の保護に関する法律 附則第一条第一項（施行期日） — https://japanlaw.org/en/personal-information-protection-act/suppl-4151-57/art-1/par-1 · https://japanlaw.org/l/415AC0000000057/suppl-4151-57/art-1/par-1

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## 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
- claude-sonnet-5-5 — Machine translation, batch personal-information-protection-act-20261010T182616-001, translated 2026-10-11
- 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