{
  "spec_version": "3",
  "endpoint": "timeline",
  "stock_code": "5110",
  "company_name": "住友ゴム工業",
  "content_lang": "ja",
  "meta_lang": "en",
  "canonical_url": "https://the-shashi.com/tse/5110/",
  "api_url": "/api/5110/timeline.json",
  "updated": "2026-08-09",
  "license": "© 2026 Yutaka Sugiura. All rights reserved.",
  "attribution": "The社史 (the-shashi.com) — https://the-shashi.com/tse/5110/",
  "source": {
    "primary": [
      "有価証券報告書"
    ],
    "extraction": "有価証券報告書の沿革を基礎に、社史・報道で補完",
    "row_field": "source"
  },
  "timeline": [
    {
      "date": "1917/3",
      "importance": 3,
      "event": "ダンロップ護謨（極東）を設立",
      "source": "有価証券報告書"
    },
    {
      "date": "1937/2",
      "importance": 2,
      "event": "日本ダンロップ護謨に商号変更",
      "source": "有価証券報告書"
    },
    {
      "date": "1943/1",
      "importance": 2,
      "event": "中央ゴム工業に商号変更",
      "source": "有価証券報告書"
    },
    {
      "date": "1949/8",
      "importance": 2,
      "event": "日本ダンロップ護謨に商号を復帰",
      "source": "有価証券報告書"
    },
    {
      "date": "1960/4",
      "importance": 2,
      "event": "住友電気工業・住友商事と資本提携",
      "source": "有価証券報告書"
    },
    {
      "date": "1961/6",
      "importance": 1,
      "event": "名古屋工場の操業開始",
      "source": "有価証券報告書"
    },
    {
      "date": "1961/10",
      "importance": 2,
      "event": "日本長期信用銀行と資本提携",
      "source": "有価証券報告書"
    },
    {
      "date": "1963/9",
      "importance": 3,
      "event": "日本側株主による経営権の取得",
      "source": "有価証券報告書",
      "link": "/tse/5110/decisions/sumitomo-management-transfer-1963/"
    },
    {
      "date": "1963/10",
      "importance": 2,
      "event": "住友ゴム工業に商号変更と日本ダンロップ護謨の設立",
      "source": "有価証券報告書"
    },
    {
      "date": "1972/1",
      "importance": 1,
      "event": "加古川工場の操業開始",
      "source": "有価証券報告書"
    },
    {
      "date": "1974/8",
      "importance": 1,
      "event": "白河工場の操業開始",
      "source": "有価証券報告書"
    },
    {
      "date": "1975/1",
      "importance": 1,
      "event": "東京・大阪・名古屋の3証券取引所第二部に上場",
      "source": "有価証券報告書"
    },
    {
      "date": "1981/5",
      "importance": 2,
      "event": "オーツタイヤ株式48%の取得と全面提携",
      "source": "有価証券報告書"
    },
    {
      "date": "1983/12",
      "importance": 3,
      "event": "英国ダンロップが保有する住友ゴム株式の日本側取得",
      "source": "有価証券報告書",
      "link": "/tse/5110/decisions/dunlop-overseas-acquisition-1985/"
    },
    {
      "date": "1984/1",
      "importance": 2,
      "event": "日本・台湾・韓国のダンロップ商標権の譲受",
      "source": "有価証券報告書"
    },
    {
      "date": "1984/7",
      "importance": 2,
      "event": "フランスにおけるダンロップ事業の経営開始",
      "source": "有価証券報告書"
    },
    {
      "date": "1985/1",
      "importance": 2,
      "event": "英国・西独のダンロップ社タイヤ工場の買収",
      "source": "有価証券報告書"
    },
    {
      "date": "1986/12",
      "importance": 2,
      "event": "米国の自動車タイヤメーカーの買収",
      "source": "有価証券報告書"
    },
    {
      "date": "1987/6",
      "importance": 1,
      "event": "3証券取引所の第一部銘柄に指定",
      "source": "有価証券報告書"
    },
    {
      "date": "1994/8",
      "importance": 1,
      "event": "神戸市中央区における本社新社屋の竣工",
      "source": "有価証券報告書"
    },
    {
      "date": "1995/1",
      "importance": 3,
      "event": "阪神大震災による神戸工場の被災と閉鎖",
      "source": "有価証券報告書"
    },
    {
      "date": "1995/7",
      "importance": 1,
      "event": "インドネシアに生産子会社を設立",
      "source": "有価証券報告書"
    },
    {
      "date": "1996/5",
      "importance": 1,
      "event": "市島工場の操業開始",
      "source": "有価証券報告書"
    },
    {
      "date": "1999/6",
      "importance": 2,
      "event": "米国グッドイヤーとの世界的提携契約の締結",
      "source": "有価証券報告書"
    },
    {
      "date": "2000/11",
      "importance": 2,
      "event": "オーツタイヤの第三者割当増資の全額引受",
      "source": "有価証券報告書"
    },
    {
      "date": "2002/7",
      "importance": 1,
      "event": "中国江蘇省常熟市に生産子会社を設立",
      "source": "有価証券報告書"
    },
    {
      "date": "2003/7",
      "importance": 2,
      "event": "オーツタイヤと日本ダンロップの吸収合併",
      "source": "有価証券報告書"
    },
    {
      "date": "2004/2",
      "importance": 1,
      "event": "名古屋証券取引所第一部の上場廃止",
      "source": "有価証券報告書"
    },
    {
      "date": "2005/5",
      "importance": 1,
      "event": "タイに生産子会社を設立",
      "source": "有価証券報告書"
    },
    {
      "date": "2006/10",
      "importance": 1,
      "event": "SRIスポーツの東京証券取引所第一部への上場",
      "source": "有価証券報告書"
    },
    {
      "date": "2007/12",
      "importance": 1,
      "event": "SRIスポーツによるクリーブランドゴルフの買収",
      "source": "有価証券報告書"
    },
    {
      "date": "2010/9",
      "importance": 1,
      "event": "中国湖南省長沙市に生産子会社を設立",
      "source": "有価証券報告書"
    },
    {
      "date": "2011/6",
      "importance": 1,
      "event": "ブラジルに子会社を設立",
      "source": "有価証券報告書"
    },
    {
      "date": "2012/5",
      "importance": 1,
      "event": "SRIスポーツがダンロップスポーツに商号変更",
      "source": "有価証券報告書"
    },
    {
      "date": "2013/2",
      "importance": 1,
      "event": "トルコに生産子会社を設立",
      "source": "有価証券報告書"
    },
    {
      "date": "2013/12",
      "importance": 2,
      "event": "南アフリカのアポロタイヤ子会社の買収",
      "source": "有価証券報告書"
    },
    {
      "date": "2015/1",
      "importance": 1,
      "event": "スイスのロンストロフの買収",
      "source": "有価証券報告書"
    },
    {
      "date": "2015/10",
      "importance": 3,
      "event": "グッドイヤーとの提携解消と北米子会社の完全子会社化",
      "source": "有価証券報告書"
    },
    {
      "date": "2017/2",
      "importance": 2,
      "event": "英国のミシェルデバーグループの買収",
      "source": "有価証券報告書"
    },
    {
      "date": "2017/4",
      "importance": 2,
      "event": "海外のダンロップ商標権とスポーツ用品事業の譲受",
      "source": "有価証券報告書"
    },
    {
      "date": "2017/12",
      "importance": 1,
      "event": "ダンロップスポーツの上場廃止",
      "source": "有価証券報告書"
    },
    {
      "date": "2018/1",
      "importance": 2,
      "event": "ダンロップスポーツの吸収合併によるスポーツ事業の統合",
      "source": "有価証券報告書"
    },
    {
      "date": "2022/4",
      "importance": 1,
      "event": "東京証券取引所プライム市場への移行",
      "source": "有価証券報告書"
    },
    {
      "date": "2024/1",
      "importance": 1,
      "event": "国内タイヤ販売機能のダンロップタイヤへの統合",
      "source": "有価証券報告書"
    },
    {
      "date": "2024/1",
      "importance": 1,
      "event": "スイスのロンストロフの売却",
      "source": "有価証券報告書"
    },
    {
      "date": "2024/11",
      "importance": 2,
      "event": "米国生産子会社の生産終了と解散の決定",
      "source": "有価証券報告書"
    },
    {
      "date": "2025/1",
      "importance": 3,
      "event": "欧米豪における四輪ダンロップ商標権の取得契約",
      "source": "有価証券報告書",
      "link": "/tse/5110/decisions/dunlop-trademark-buyback-2025/"
    },
    {
      "date": "2025/10",
      "importance": 1,
      "event": "米国のViaductの買収",
      "source": "有価証券報告書"
    }
  ]
}