会社法第309条
Shareholders' Meeting Resolutions
株主総会の決議
Plain-language explanation
Note: The retrieved database did not return the actual text of Companies Act Article 309 (only Article 309 of the Civil Code, Local Tax Act, and Code of Civil Procedure were found). The explanation below is based on generally known content of this provision as it is widely referenced in Japanese corporate practice, and should be verified against the current statute text.
Article 309 of the Companies Act sets out the voting thresholds required to pass resolutions at a shareholders' meeting. For an "ordinary resolution" (普通決議), a quorum of shareholders holding a majority of voting rights must be present, and the resolution passes with a majority of the votes cast. For more significant matters — such as amending the articles of incorporation, transferring a major part of the business, mergers, or dissolution — a "special resolution" (特別決議) is required, which needs a quorum holding a majority of voting rights and approval by two-thirds or more of the votes of shareholders present. For especially major structural changes (such as certain types of organizational conversions or squeeze-outs affecting all shares of a class), an even stricter "special majority resolution" (特殊決議) may apply.
In practice, companies should check their own articles of incorporation, since quorum requirements can sometimes be relaxed or tightened depending on whether the company has a board of directors and what the articles specify. Passing a matter that legally requires a special resolution using only ordinary-resolution voting thresholds is a common and serious mistake — it can expose the resolution to a shareholder lawsuit seeking to revoke or invalidate it. Companies should carefully classify each agenda item before drafting the meeting notice and tallying proxy votes.
日本語での解説
note: 検索結果に会社法第309条の条文本文が見つかりませんでした（民法・地方税法・民事訴訟法の第309条のみ取得）。以下は会社法第309条について一般に知られている内容に基づく参考的な説明であり、正確な条文確認をお勧めします。
会社法第309条は、株主総会における決議の成立要件を定める条文です。通常の決議（普通決議）は議決権の過半数を有する株主が出席し、出席株主の議決権の過半数で成立します。一方、定款変更、事業譲渡、合併、解散など会社の根幹に関わる重要事項については「特別決議」が必要とされ、議決権を行使できる株主の議決権の過半数を有する株主が出席し、出席株主の議決権の3分の2以上の賛成が必要になります。さらに、種類株式の全部取得や組織変更など特に重大な事項については、さらに厳格な「特殊決議」の要件が定められています。
実務上は、取締役会の設置有無や定款の定めによって定足数を緩和・加重できる部分があるため、自社の定款を必ず確認する必要があります。特別決議が必要な議案を普通決議の要件で可決してしまうと、決議取消しや無効の訴えを招くリスクがあるため、招集通知の記載や議決権行使書の集計段階で慎重な確認が求められます。
Common scenarios
- ▸定款変更（例：事業目的の追加、株式譲渡制限の設定）を株主総会で決議する場面
- ▸会社の重要な事業を譲渡する契約を締結する前に必要な株主総会特別決議の準備
- ▸他社との合併・会社分割の承認を得るための株主総会決議の設計
- ▸招集通知作成時に、議案ごとに普通決議か特別決議かを誤りなく判定する社内チェック
- ▸少数株主から決議取消しの訴えを起こされた際に、決議要件を満たしていたかを検証する場面
Related statutes
- 会社法第308条
- 会社法第310条
- 会社法第831条
- 会社法第466条
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