# 会社法 / Companies Act — 第百七十条 (Article 170)

- 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: 第百七十条 (Article 170)（効力の発生等） — address `art-170`
- Text in force since: 2026-08-12
- URL (the page that opens at this provision): https://japanlaw.org/ja/companies-act/art-170
- Permanent URL (e-Gov law ID, never renamed): https://japanlaw.org/l/417AC0000000086/art-170
- 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.

---

### 第百七十条（効力の発生等） — (Effectuation)
<sup>caption: Ministry of Justice translation — Japanese Law Translation Database System</sup>
<sup>art-170 · https://japanlaw.org/ja/companies-act/art-170 · https://japanlaw.org/l/417AC0000000086/art-170</sup>

        **第一項**  株式会社は、第百七条第二項第三号イの事由が生じた日（同号ハに掲げる事項についての定めがある場合にあっては、第一号に掲げる日又は第二号に掲げる日のいずれか遅い日。次項及び第五項において同じ。）に、取得条項付株式（同条第二項第三号ハに掲げる事項についての定めがある場合にあっては、前条第一項の規定により決定したもの。次項において同じ。）を取得する。
        <sup>art-170/par-1 · https://japanlaw.org/ja/companies-act/art-170/par-1 · https://japanlaw.org/l/417AC0000000086/art-170/par-1</sup>
        A stock company acquires, on the day when the grounds under Article 107, paragraph (2), item (iii), (a) have arisen (or, if there are provisions with respect to the matters set forth in (c) of that item, on the day set forth in item (i) or the day set forth in item (ii) below, whichever comes later; the same applies in the following paragraph and paragraph (5)), the shares subject to call (or, if there are provisions with respect to the matters set forth in paragraph (2), item (iii), (c) of that Article, those determined pursuant to the provisions of paragraph (1) of the preceding Article; the same applies in the following paragraph):
        <sup>Ministry of Justice translation — Japanese Law Translation Database System</sup>

          **一**  第百七条第二項第三号イの事由が生じた日
          <sup>art-170/par-1/item-1 · https://japanlaw.org/ja/companies-act/art-170/par-1/item-1 · https://japanlaw.org/l/417AC0000000086/art-170/par-1/item-1</sup>
          the day when grounds under Article 107, paragraph (2), item (iii), (a) have arisen; or
          <sup>Ministry of Justice translation — Japanese Law Translation Database System</sup>

          **二**  前条第三項の規定による通知の日又は同条第四項の公告の日から二週間を経過した日
          <sup>art-170/par-1/item-2 · https://japanlaw.org/ja/companies-act/art-170/par-1/item-2 · https://japanlaw.org/l/417AC0000000086/art-170/par-1/item-2</sup>
          the day of notice pursuant to the provisions of paragraph (3) of the preceding Article, or the day when two weeks have lapsed from the day of the public notice under paragraph (4) of that Article.
          <sup>Ministry of Justice translation — Japanese Law Translation Database System</sup>

        **第二項**  次の各号に掲げる場合には、取得条項付株式の株主（当該株式会社を除く。）は、第百七条第二項第三号イの事由が生じた日に、同号（種類株式発行会社にあっては、第百八条第二項第六号）に定める事項についての定めに従い、当該各号に定める者となる。
        <sup>art-170/par-2 · https://japanlaw.org/ja/companies-act/art-170/par-2 · https://japanlaw.org/l/417AC0000000086/art-170/par-2</sup>
        In the cases set forth in the following items, the shareholders of the shares subject to call (excluding the relevant stock company) become the persons specified in each of those items in accordance with the provisions with respect to the matters provided for in Article 107, paragraph (2), item (iii), (a) (or, for a company with class shares, Article 108, paragraph (2), item (vi)) on the day when the grounds under Article 107, paragraph (2), item (iii), (a) arise:
        <sup>Ministry of Justice translation — Japanese Law Translation Database System</sup>

          **一**  第百七条第二項第三号ニに掲げる事項についての定めがある場合　同号ニの社債の社債権者
          <sup>art-170/par-2/item-1 · https://japanlaw.org/ja/companies-act/art-170/par-2/item-1 · https://japanlaw.org/l/417AC0000000086/art-170/par-2/item-1</sup>
          if there are provisions on the matters set forth in Article 107, paragraph (2), item (iii), (d):holders of the bonds referred to in (d) of that item;
          <sup>Ministry of Justice translation — Japanese Law Translation Database System</sup>

          **二**  第百七条第二項第三号ホに掲げる事項についての定めがある場合　同号ホの新株予約権の新株予約権者
          <sup>art-170/par-2/item-2 · https://japanlaw.org/ja/companies-act/art-170/par-2/item-2 · https://japanlaw.org/l/417AC0000000086/art-170/par-2/item-2</sup>
          if there are provisions on the matters set forth in Article 107, paragraph (2), item (iii), (e):share option holder referred to in (e) of that item;
          <sup>Ministry of Justice translation — Japanese Law Translation Database System</sup>

          **三**  第百七条第二項第三号ヘに掲げる事項についての定めがある場合　同号ヘの新株予約権付社債についての社債の社債権者及び当該新株予約権付社債に付された新株予約権の新株予約権者
          <sup>art-170/par-2/item-3 · https://japanlaw.org/ja/companies-act/art-170/par-2/item-3 · https://japanlaw.org/l/417AC0000000086/art-170/par-2/item-3</sup>
          if there are provisions on the matters set forth in Article 107, paragraph (2), item (iii), (f):holders of the bonds constituting the bonds with share option referred to in (f) of that item, and holders of share options attached to those bonds;
          <sup>Ministry of Justice translation — Japanese Law Translation Database System</sup>

          **四**  第百八条第二項第六号ロに掲げる事項についての定めがある場合　同号ロの他の株式の株主
          <sup>art-170/par-2/item-4 · https://japanlaw.org/ja/companies-act/art-170/par-2/item-4 · https://japanlaw.org/l/417AC0000000086/art-170/par-2/item-4</sup>
          if there are provisions on the matters set forth in Article 108, paragraph (2), item (vi), (b):holders of the relevant other shares referred to in (b) of that item.
          <sup>Ministry of Justice translation — Japanese Law Translation Database System</sup>

        **第三項**  株式会社は、第百七条第二項第三号イの事由が生じた後、遅滞なく、取得条項付株式の株主及びその登録株式質権者（同号ハに掲げる事項についての定めがある場合にあっては、前条第一項の規定により決定した取得条項付株式の株主及びその登録株式質権者）に対し、当該事由が生じた旨を通知しなければならない。ただし、第百六十八条第二項の規定による通知又は同条第三項の公告をしたときは、この限りでない。
        <sup>art-170/par-3 · https://japanlaw.org/ja/companies-act/art-170/par-3 · https://japanlaw.org/l/417AC0000000086/art-170/par-3</sup>
        A stock company must notify the shareholders of shares subject to call and registered pledgees of shares thereof without delay after grounds have arisen referred to in Article 107, paragraph (2), item (iii), (a) (if there are provisions regarding the matters set forth in (c) of that item, the holders of shares subject to call determined pursuant to the provisions of paragraph (1) of the preceding Article, and the registered pledgees of shares) to the effect that relevant grounds have arisen; provided, however, that this does not apply if the stock company has given notice referred to in the provisions of Article 168, paragraph (2) or has given public notice referred to in the provisions of paragraph (3) of that Article.
        <sup>Ministry of Justice translation — Japanese Law Translation Database System</sup>

        **第四項**  前項本文の規定による通知は、公告をもってこれに代えることができる。
        <sup>art-170/par-4 · https://japanlaw.org/ja/companies-act/art-170/par-4 · https://japanlaw.org/l/417AC0000000086/art-170/par-4</sup>
        A public notice may be substituted for the notice referred to in the provisions of the preceding paragraph.
        <sup>Ministry of Justice translation — Japanese Law Translation Database System</sup>

        **第五項**  前各項の規定は、取得条項付株式を取得するのと引換えに第百七条第二項第三号ニからトまでに規定する財産を交付する場合において、これらの財産の帳簿価額が同号イの事由が生じた日における第四百六十一条第二項の分配可能額を超えているときは、適用しない。
        <sup>art-170/par-5 · https://japanlaw.org/ja/companies-act/art-170/par-5 · https://japanlaw.org/l/417AC0000000086/art-170/par-5</sup>
        The provisions of the preceding paragraphs do not apply if, if the properties provided for in Article 107, paragraph (2), item (iii), (d) through (g) is delivered in exchange for the acquisition of the shares subject to call, the book value of relevant properties exceeds the distributable amount under Article 461, paragraph (2) on the day when the grounds under Article 107, paragraph (2), item (iii), (a) arose.
        <sup>Ministry of Justice translation — Japanese Law Translation Database System</sup>

---

## Cites
- art-170/par-1: 第百七条第二項第三号 → 会社法 第百七条第二項第三号 (Article 107, paragraph (2), item (iii)), art-107/par-2/item-3 — https://japanlaw.org/ja/companies-act/art-107/par-2/item-3 · https://japanlaw.org/l/417AC0000000086/art-107/par-2/item-3
- art-170/par-1: 第一号 → 会社法 第百七十条第一項第一号 (Article 170, paragraph (1), item (i)), art-170/par-1/item-1 — https://japanlaw.org/ja/companies-act/art-170/par-1/item-1 · https://japanlaw.org/l/417AC0000000086/art-170/par-1/item-1
- art-170/par-1: 第二号 → 会社法 第百七十条第一項第二号 (Article 170, paragraph (1), item (ii)), art-170/par-1/item-2 — https://japanlaw.org/ja/companies-act/art-170/par-1/item-2 · https://japanlaw.org/l/417AC0000000086/art-170/par-1/item-2
- art-170/par-1: 次項 → 会社法 第百七十条第二項 (Article 170, paragraph (2)), art-170/par-2 — https://japanlaw.org/ja/companies-act/art-170/par-2 · https://japanlaw.org/l/417AC0000000086/art-170/par-2
- art-170/par-1: 第五項 → 会社法 第百七十条第五項 (Article 170, paragraph (5)), art-170/par-5 — https://japanlaw.org/ja/companies-act/art-170/par-5 · https://japanlaw.org/l/417AC0000000086/art-170/par-5
- art-170/par-1: 前条第一項 → 会社法 第百六十九条第一項 (Article 169, paragraph (1)), art-169/par-1 — https://japanlaw.org/ja/companies-act/art-169/par-1 · https://japanlaw.org/l/417AC0000000086/art-169/par-1
- art-170/par-1/item-1: 第百七条第二項第三号 → 会社法 第百七条第二項第三号 (Article 107, paragraph (2), item (iii)), art-107/par-2/item-3 — https://japanlaw.org/ja/companies-act/art-107/par-2/item-3 · https://japanlaw.org/l/417AC0000000086/art-107/par-2/item-3
- art-170/par-1/item-2: 前条第三項 → 会社法 第百六十九条第三項 (Article 169, paragraph (3)), art-169/par-3 — https://japanlaw.org/ja/companies-act/art-169/par-3 · https://japanlaw.org/l/417AC0000000086/art-169/par-3
- art-170/par-1/item-2: 同条第四項 → 会社法 第百六十九条第四項 (Article 169, paragraph (4)), art-169/par-4 — https://japanlaw.org/ja/companies-act/art-169/par-4 · https://japanlaw.org/l/417AC0000000086/art-169/par-4
- art-170/par-2: 第百七条第二項第三号 → 会社法 第百七条第二項第三号 (Article 107, paragraph (2), item (iii)), art-107/par-2/item-3 — https://japanlaw.org/ja/companies-act/art-107/par-2/item-3 · https://japanlaw.org/l/417AC0000000086/art-107/par-2/item-3
- art-170/par-2: 第百八条第二項第六号 → 会社法 第百八条第二項第六号 (Article 108, paragraph (2), item (vi)), art-108/par-2/item-6 — https://japanlaw.org/ja/companies-act/art-108/par-2/item-6 · https://japanlaw.org/l/417AC0000000086/art-108/par-2/item-6
- art-170/par-2/item-1: 第百七条第二項第三号 → 会社法 第百七条第二項第三号 (Article 107, paragraph (2), item (iii)), art-107/par-2/item-3 — https://japanlaw.org/ja/companies-act/art-107/par-2/item-3 · https://japanlaw.org/l/417AC0000000086/art-107/par-2/item-3
- art-170/par-2/item-2: 第百七条第二項第三号 → 会社法 第百七条第二項第三号 (Article 107, paragraph (2), item (iii)), art-107/par-2/item-3 — https://japanlaw.org/ja/companies-act/art-107/par-2/item-3 · https://japanlaw.org/l/417AC0000000086/art-107/par-2/item-3
- art-170/par-2/item-3: 第百七条第二項第三号 → 会社法 第百七条第二項第三号 (Article 107, paragraph (2), item (iii)), art-107/par-2/item-3 — https://japanlaw.org/ja/companies-act/art-107/par-2/item-3 · https://japanlaw.org/l/417AC0000000086/art-107/par-2/item-3
- art-170/par-2/item-4: 第百八条第二項第六号 → 会社法 第百八条第二項第六号 (Article 108, paragraph (2), item (vi)), art-108/par-2/item-6 — https://japanlaw.org/ja/companies-act/art-108/par-2/item-6 · https://japanlaw.org/l/417AC0000000086/art-108/par-2/item-6
- art-170/par-3: 第百七条第二項第三号 → 会社法 第百七条第二項第三号 (Article 107, paragraph (2), item (iii)), art-107/par-2/item-3 — https://japanlaw.org/ja/companies-act/art-107/par-2/item-3 · https://japanlaw.org/l/417AC0000000086/art-107/par-2/item-3
- art-170/par-3: 前条第一項 → 会社法 第百六十九条第一項 (Article 169, paragraph (1)), art-169/par-1 — https://japanlaw.org/ja/companies-act/art-169/par-1 · https://japanlaw.org/l/417AC0000000086/art-169/par-1
- art-170/par-3: 第百六十八条第二項 → 会社法 第百六十八条第二項 (Article 168, paragraph (2)), art-168/par-2 — https://japanlaw.org/ja/companies-act/art-168/par-2 · https://japanlaw.org/l/417AC0000000086/art-168/par-2
- art-170/par-3: 同条第三項 → 会社法 第百六十八条第三項 (Article 168, paragraph (3)), art-168/par-3 — https://japanlaw.org/ja/companies-act/art-168/par-3 · https://japanlaw.org/l/417AC0000000086/art-168/par-3
- art-170/par-4: 前項 → 会社法 第百七十条第三項 (Article 170, paragraph (3)), art-170/par-3 — https://japanlaw.org/ja/companies-act/art-170/par-3 · https://japanlaw.org/l/417AC0000000086/art-170/par-3
- art-170/par-5: 前各項 → 会社法 第百七十条第一項 (Article 170, paragraph (1)), art-170/par-1 — https://japanlaw.org/ja/companies-act/art-170/par-1 · https://japanlaw.org/l/417AC0000000086/art-170/par-1
- art-170/par-5: 前各項 → 会社法 第百七十条第二項 (Article 170, paragraph (2)), art-170/par-2 — https://japanlaw.org/ja/companies-act/art-170/par-2 · https://japanlaw.org/l/417AC0000000086/art-170/par-2
- art-170/par-5: 前各項 → 会社法 第百七十条第三項 (Article 170, paragraph (3)), art-170/par-3 — https://japanlaw.org/ja/companies-act/art-170/par-3 · https://japanlaw.org/l/417AC0000000086/art-170/par-3
- art-170/par-5: 前各項 → 会社法 第百七十条第四項 (Article 170, paragraph (4)), art-170/par-4 — https://japanlaw.org/ja/companies-act/art-170/par-4 · https://japanlaw.org/l/417AC0000000086/art-170/par-4
- art-170/par-5: 第百七条第二項第三号 → 会社法 第百七条第二項第三号 (Article 107, paragraph (2), item (iii)), art-107/par-2/item-3 — https://japanlaw.org/ja/companies-act/art-107/par-2/item-3 · https://japanlaw.org/l/417AC0000000086/art-107/par-2/item-3
- art-170/par-5: 第四百六十一条第二項 → 会社法 第四百六十一条第二項 (Article 461, paragraph (2)), art-461/par-2 — https://japanlaw.org/ja/companies-act/art-461/par-2 · https://japanlaw.org/l/417AC0000000086/art-461/par-2

## Cited by

7 provisions cite this one. No official source publishes this direction.

- 会社法 第百十四条第二項第二号（発行可能種類株式総数） — https://japanlaw.org/ja/companies-act/art-114/par-2/item-2 · https://japanlaw.org/l/417AC0000000086/art-114/par-2/item-2
- 会社法 第百五十一条第一項第二号（株式の質入れの効果） — https://japanlaw.org/ja/companies-act/art-151/par-1/item-2 · https://japanlaw.org/l/417AC0000000086/art-151/par-1/item-2
- 会社法 第百七十条第一項（効力の発生等） — https://japanlaw.org/ja/companies-act/art-170/par-1 · https://japanlaw.org/l/417AC0000000086/art-170/par-1
- 会社法 第百七十条第四項（効力の発生等） — https://japanlaw.org/ja/companies-act/art-170/par-4 · https://japanlaw.org/l/417AC0000000086/art-170/par-4
- 会社法 第百七十条第五項（効力の発生等） — https://japanlaw.org/ja/companies-act/art-170/par-5 · https://japanlaw.org/l/417AC0000000086/art-170/par-5
- 会社法 第二百三十四条第一項第一号（一に満たない端数の処理） — https://japanlaw.org/ja/companies-act/art-234/par-1/item-1 · https://japanlaw.org/l/417AC0000000086/art-234/par-1/item-1
- 会社法 第四百六十五条第一項第五号（欠損が生じた場合の責任） — https://japanlaw.org/ja/companies-act/art-465/par-1/item-5 · https://japanlaw.org/l/417AC0000000086/art-465/par-1/item-5

---

## 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 211 — 会社法 — structure, counts, cross-references and defined terms, computed 2026-09-17