# 会社法 / Companies Act — 第三百九十九条の四 (Article 399-4)

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- Law: 会社法 (Companies Act), 平成十七年法律第八十六号
- English title "Companies Act": 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: 第三百九十九条の四 (Article 399-4)（取締役会への報告義務） — address `art-399-4`
- Text in force since: 2026-08-12
- URL (the page that opens at this provision): https://japanlaw.org/en/companies-act/art-399-4
- Permanent URL (e-Gov law ID, never renamed): https://japanlaw.org/l/417AC0000000086/art-399-4
- 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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### 第三百九十九条の四（取締役会への報告義務） — (Duty to Report to Board of Directors)
<sup>caption: Ministry of Justice translation — Japanese Law Translation Database System</sup>
<sup>art-399-4 · https://japanlaw.org/en/companies-act/art-399-4 · https://japanlaw.org/l/417AC0000000086/art-399-4</sup>

      **第一項**  監査等委員は、取締役が不正の行為をし、若しくは当該行為をするおそれがあると認めるとき、又は法令若しくは定款に違反する事実若しくは著しく不当な事実があると認めるときは、遅滞なく、その旨を取締役会に報告しなければならない。
      <sup>art-399-4/par-1 · https://japanlaw.org/en/companies-act/art-399-4/par-1 · https://japanlaw.org/l/417AC0000000086/art-399-4/par-1</sup>
      If audit and supervisory committee members find that directors engage in misconduct, or are likely to engage in relevant act, or that there are facts in violation of laws and regulations or the articles of incorporation or grossly improper facts, they must report to that effect to the board of directors without delay.
      <sup>Ministry of Justice translation — Japanese Law Translation Database System</sup>

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## Sources

- e-Gov 法令検索, Digital Agency (デジタル庁) — 会社法 — the text in force from 2026-08-12 (https://laws.e-gov.go.jp/law/417AC0000000086/20260812_508AC0000000064), retrieved 2026-09-17
- Japanese Law Translation Database System, Ministry of Justice (法務省) — Companies Act — Ministry of Justice translation (part 1 of 2) (https://www.japaneselawtranslation.go.jp/en/laws/view/4481/tb), retrieved 2026-09-17
- This site's parser, version 223 — 会社法 — structure, counts, cross-references and defined terms, computed 2026-09-17