{
  "timeline": [
    {
      "date": "1948/8",
      "tags": [
        "会社設立"
      ],
      "category": "会社設立",
      "region": "",
      "importance": 2,
      "event": "伊藤譲を代表者として法人組織の合資会社羊華堂を設立",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1956/7",
      "tags": [
        "社長交代"
      ],
      "category": "社長交代",
      "region": "",
      "importance": 3,
      "event": "伊藤譲の死去にともない伊藤雅俊が合資会社羊華堂の経営を継承",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1958/4",
      "tags": [
        "会社設立",
        "業態転換"
      ],
      "category": "会社設立|業態転換",
      "region": "",
      "importance": 3,
      "event": "大量販売方式を実行するため株式会社ヨーカ堂を設立し、東京都足立区千住の店舗を増改築して営業を開始",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1962/11",
      "tags": [],
      "category": "",
      "region": "",
      "importance": 1,
      "event": "本店を東京都台東区入谷に移転",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1965/6",
      "tags": [
        "組織再編"
      ],
      "category": "組織再編",
      "region": "",
      "importance": 2,
      "event": "株式会社ヨーカ堂の社名を株式会社伊藤ヨーカ堂に変更",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1967/9",
      "tags": [],
      "category": "",
      "region": "",
      "importance": 1,
      "event": "本店を東京都港区麻布十番に移転",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1970/10",
      "tags": [
        "組織再編"
      ],
      "category": "組織再編",
      "region": "",
      "importance": 1,
      "event": "川越倉庫株式会社が株式会社イトーヨーカ堂に社名を変更",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1971/3",
      "tags": [
        "組織再編"
      ],
      "category": "組織再編",
      "region": "",
      "importance": 2,
      "event": "株式の額面変更のため、川越倉庫を前身とする株式会社イトーヨーカ堂に吸収合併され、実質上の存続会社として営業を継続",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1972/4",
      "tags": [],
      "category": "",
      "region": "",
      "importance": 1,
      "event": "新マーク採用にあたり、ロゴタイプをイトーヨーカ堂からイトーヨーカドーに変更",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1972/9",
      "tags": [
        "株式上場"
      ],
      "category": "株式上場",
      "region": "",
      "importance": 3,
      "event": "東京証券取引所市場第二部に株式を上場",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書",
      "link": "/tse/8264/decisions/low-land-price-policy-1972/"
    },
    {
      "date": "1972/11",
      "tags": [
        "会社設立"
      ],
      "category": "会社設立",
      "region": "",
      "importance": 1,
      "event": "株式会社ヨークフードサービス（後の株式会社ファミール）を設立",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1972/12",
      "tags": [],
      "category": "",
      "region": "",
      "importance": 1,
      "event": "本店を東京都千代田区三番町に移転",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1973/3",
      "tags": [
        "業務提携"
      ],
      "category": "業務提携",
      "region": "",
      "importance": 2,
      "event": "株式会社ヨークベニマルと業務提携",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1973/5",
      "tags": [
        "業務提携",
        "新規事業"
      ],
      "category": "業務提携|新規事業",
      "region": "",
      "importance": 2,
      "event": "米国レストランチェーンのデニーズ社と提携し、外食事業に参入",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1973/7",
      "tags": [
        "株式上場"
      ],
      "category": "株式上場",
      "region": "",
      "importance": 1,
      "event": "東京証券取引所市場第一部に指定替え",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1973/11",
      "tags": [
        "業務提携",
        "新規事業"
      ],
      "category": "業務提携|新規事業",
      "region": "",
      "importance": 3,
      "event": "米国のコンビニエンスストア大手 THE SOUTHLAND CORPORATION（現 7-Eleven, Inc.）と提携し、株式会社ヨークセブン（現 株式会社セブン－イレブン・ジャパン）を設立",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1973/11",
      "tags": [
        "新規事業"
      ],
      "category": "新規事業",
      "region": "",
      "importance": 2,
      "event": "デニーズ社との提携にもとづき株式会社デニーズジャパンを設立",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1975/12",
      "tags": [
        "会社設立"
      ],
      "category": "会社設立",
      "region": "",
      "importance": 1,
      "event": "食品スーパーマーケットの株式会社ヨークマートを設立",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1976/2",
      "tags": [
        "株式上場"
      ],
      "category": "株式上場",
      "region": "",
      "importance": 1,
      "event": "コンチネンタル預託証券（CDR）発行に伴いルクセンブルグ証券取引所に上場",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1977/7",
      "tags": [
        "株式上場"
      ],
      "category": "株式上場",
      "region": "",
      "importance": 1,
      "event": "米国ナスダック（NASDAQ）へ登録",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1981/8",
      "tags": [],
      "category": "",
      "region": "",
      "importance": 1,
      "event": "本店を東京都港区芝公園に移転",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1981/9",
      "tags": [
        "株式上場"
      ],
      "category": "株式上場",
      "region": "",
      "importance": 1,
      "event": "パリ証券取引所（現 ユーロネクスト（パリ））に上場",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1982",
      "tags": [
        "構造改革"
      ],
      "category": "構造改革",
      "region": "",
      "importance": 3,
      "event": "1983年2月期の上場以来初の経常減益を受けて業務改革（業革）に着手し、セブン－イレブンで確立した単品管理と仮説検証の手法を総合スーパー本体へ導入",
      "detail": "",
      "significance": "",
      "source": "週刊東洋経済 2003年2月22日号「イトーヨーカ堂の『業革』と『カイゼン』」",
      "link": "/tse/8264/decisions/business-reform-1982/"
    },
    {
      "date": "1985/12",
      "tags": [
        "IT投資"
      ],
      "category": "IT投資",
      "region": "",
      "importance": 2,
      "event": "POSレジスターを全店に導入",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1986/7",
      "tags": [
        "株式上場"
      ],
      "category": "株式上場",
      "region": "",
      "importance": 1,
      "event": "米国ナスダック市場ナショナルマーケットシステムへ指定替え",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1991/3",
      "tags": [
        "企業買収",
        "海外進出"
      ],
      "category": "企業買収|海外進出",
      "region": "米州",
      "importance": 3,
      "event": "株式会社セブン－イレブン・ジャパンとともに IYG Holding Company を通じて 7-Eleven, Inc. へ資本参加し、経営権を取得",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1992",
      "tags": [],
      "category": "",
      "region": "",
      "importance": 3,
      "event": "地価上昇を前提とする不動産投資と時価発行増資を見送り、手元現金を積み増す財務方針を継続（アンチ“含み”経営）",
      "detail": "",
      "significance": "",
      "source": "日経ビジネス 1992年10月5日号「編集長インタビュー 伊藤雅俊」",
      "link": "/tse/8264/decisions/anti-fukumi-management-1992/"
    },
    {
      "date": "1992/10",
      "tags": [
        "社長交代",
        "ガバナンス改革"
      ],
      "category": "社長交代|ガバナンス改革",
      "region": "",
      "importance": 3,
      "event": "総会屋への利益供与事件の責任をとり伊藤雅俊が社長を辞任、鈴木敏文が社長に就任",
      "detail": "",
      "significance": "",
      "source": "週刊東洋経済 2023年4月1日号「追悼／伊藤雅俊 セブン＆アイ・HD名誉会長」"
    },
    {
      "date": "1997/9",
      "tags": [
        "海外進出"
      ],
      "category": "海外進出",
      "region": "中国",
      "importance": 2,
      "event": "中国に華糖洋華堂商業有限公司を設立",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2001/4",
      "tags": [
        "新規事業"
      ],
      "category": "新規事業",
      "region": "",
      "importance": 2,
      "event": "株式会社アイワイバンク銀行（現 株式会社セブン銀行）を設立",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2001/10",
      "tags": [
        "新規事業"
      ],
      "category": "新規事業",
      "region": "",
      "importance": 1,
      "event": "株式会社アイワイ・カード・サービスを設立",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2002/3",
      "tags": [
        "上場廃止"
      ],
      "category": "上場廃止",
      "region": "",
      "importance": 1,
      "event": "ルクセンブルグ証券取引所の上場を廃止",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2003/5",
      "tags": [
        "上場廃止"
      ],
      "category": "上場廃止",
      "region": "",
      "importance": 1,
      "event": "米国ナスダックにおけるイトーヨーカ堂の米国預託証券（ADR）の登録を廃止",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2004/5",
      "tags": [],
      "category": "",
      "region": "",
      "importance": 1,
      "event": "本店を東京都千代田区二番町に移転",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2005/4",
      "tags": [
        "組織再編"
      ],
      "category": "組織再編",
      "region": "",
      "importance": 2,
      "event": "イトーヨーカ堂・セブン－イレブン・ジャパン・デニーズジャパンの3社が共同株式移転により持株会社を設立することを取締役会で決議し、株式移転契約書を締結",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2005/5",
      "tags": [
        "組織再編"
      ],
      "category": "組織再編",
      "region": "",
      "importance": 2,
      "event": "3社の株主総会において株式移転による持株会社設立を承認",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2005/8",
      "tags": [
        "上場廃止"
      ],
      "category": "上場廃止",
      "region": "",
      "importance": 2,
      "event": "東京証券取引所市場第一部およびユーロネクスト（パリ）の上場を廃止",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2005/9",
      "tags": [
        "組織再編",
        "上場廃止"
      ],
      "category": "組織再編|上場廃止",
      "region": "",
      "importance": 3,
      "event": "3社共同株式移転により株式会社セブン＆アイ・ホールディングスを設立し、同社の完全子会社となる",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書",
      "link": "/tse/3382/decisions/holding-company-2005/"
    }
  ]
}