# 会社法 / Companies Act — 第百九十一条 (Article 191)

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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: 第百九十一条 (Article 191)（定款変更手続の特則） — address `art-191`
- Text in force since: 2026-08-12
- URL (the page that opens at this provision): https://japanlaw.org/en/companies-act/art-191
- Permanent URL (e-Gov law ID, never renamed): https://japanlaw.org/l/417AC0000000086/art-191
- 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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### 第百九十一条（定款変更手続の特則） — (Special Provisions on Procedures)
<sup>caption: Ministry of Justice translation — Japanese Law Translation Database System</sup>
<sup>art-191 · https://japanlaw.org/en/companies-act/art-191 · https://japanlaw.org/l/417AC0000000086/art-191</sup>

      **第一項**  株式会社は、次のいずれにも該当する場合には、第四百六十六条の規定にかかわらず、株主総会の決議によらないで、単元株式数（種類株式発行会社にあっては、各種類の株式の単元株式数。以下この条において同じ。）を増加し、又は単元株式数についての定款の定めを設ける定款の変更をすることができる。
      <sup>art-191/par-1 · https://japanlaw.org/en/companies-act/art-191/par-1 · https://japanlaw.org/l/417AC0000000086/art-191/par-1</sup>
      Notwithstanding the provisions of Article 466, a stock company may effect an amendment to the articles of incorporation that will increase the size of the share unit (or, for a company with class shares, the size of the share unit for the shares of each class; hereinafter the same applies in this Article) or create the provisions in the articles of incorporation with respect to the share unit without a resolution at a shareholders meeting, in cases that fall under both of the following items:
      <sup>Ministry of Justice translation — Japanese Law Translation Database System</sup>

        **一**  株式の分割と同時に単元株式数を増加し、又は単元株式数についての定款の定めを設けるものであること。
        <sup>art-191/par-1/item-1 · https://japanlaw.org/en/companies-act/art-191/par-1/item-1 · https://japanlaw.org/l/417AC0000000086/art-191/par-1/item-1</sup>
        that the amendment will increase the size of the share unit simultaneously with a share split, or create the provisions in the articles of incorporation with respect to the share unit; and
        <sup>Ministry of Justice translation — Japanese Law Translation Database System</sup>

        **二**  イに掲げる数がロに掲げる数を下回るものでないこと。
        <sup>art-191/par-1/item-2 · https://japanlaw.org/en/companies-act/art-191/par-1/item-2 · https://japanlaw.org/l/417AC0000000086/art-191/par-1/item-2</sup>
        that the number provided for in (a) below is not less than the number provided for in (b) below:
        <sup>Ministry of Justice translation — Japanese Law Translation Database System</sup>

          **イ**  当該定款の変更後において各株主がそれぞれ有する株式の数を単元株式数で除して得た数
          <sup>art-191/par-1/item-2/sub-1 · https://japanlaw.org/en/companies-act/art-191/par-1/item-2/sub-1 · https://japanlaw.org/l/417AC0000000086/art-191/par-1/item-2/sub-1</sup>
          the number obtained by dividing the number of the shares held by each shareholder after the amendment to the articles of incorporation by the share unit;
          <sup>Ministry of Justice translation — Japanese Law Translation Database System</sup>

          **ロ**  当該定款の変更前において各株主がそれぞれ有する株式の数（単元株式数を定めている場合にあっては、当該株式の数を単元株式数で除して得た数）
          <sup>art-191/par-1/item-2/sub-2 · https://japanlaw.org/en/companies-act/art-191/par-1/item-2/sub-2 · https://japanlaw.org/l/417AC0000000086/art-191/par-1/item-2/sub-2</sup>
          the number of the shares held by each shareholder before relevant amendment to the articles of incorporation (or, if the share unit is prescribed, the number obtained by dividing the number of relevant shares by the share unit).
          <sup>Ministry of Justice translation — Japanese Law Translation Database System</sup>

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## Cites
- art-191/par-1: 第四百六十六条 → 会社法 第四百六十六条 (Article 466), art-466 — https://japanlaw.org/en/companies-act/art-466 · https://japanlaw.org/l/417AC0000000086/art-466
- art-191/par-1: この条 → 会社法 第百九十一条 (Article 191), art-191 — https://japanlaw.org/en/companies-act/art-191 · https://japanlaw.org/l/417AC0000000086/art-191

## Cited by

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

- 会社法 第百九十一条第一項（定款変更手続の特則） — https://japanlaw.org/en/companies-act/art-191/par-1 · https://japanlaw.org/l/417AC0000000086/art-191/par-1

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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