{
  "spec_version": "3",
  "endpoint": "timeline",
  "stock_code": "9533",
  "company_name": "東邦ガス",
  "content_lang": "ja",
  "meta_lang": "en",
  "canonical_url": "https://the-shashi.com/tse/9533/",
  "api_url": "/api/9533/timeline.json",
  "updated": "2026-08-14",
  "license": "© 2026 Yutaka Sugiura. All rights reserved.",
  "attribution": "The社史 (the-shashi.com) — https://the-shashi.com/tse/9533/",
  "source": {
    "primary": [
      "有価証券報告書（沿革）"
    ],
    "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": "1922/7",
      "importance": 3,
      "event": "資本金22百万円で設立。名古屋瓦斯を買収しガス事業開始",
      "source": null
    },
    {
      "date": "1927/3",
      "importance": 2,
      "event": "西部合同瓦斯（福岡、長崎、佐世保、熊本）を合併",
      "source": null
    },
    {
      "date": "1930/12",
      "importance": 2,
      "event": "福岡、長崎、佐世保、熊本等のガス事業を西部瓦斯に譲渡",
      "source": null
    },
    {
      "date": "1936/12",
      "importance": 1,
      "event": "岡崎瓦斯の株式を取得し経営に参画",
      "source": null
    },
    {
      "date": "1940/1",
      "importance": 1,
      "event": "熱田製造所（旧港明工場）操業開始",
      "source": null
    },
    {
      "date": "1949/5",
      "importance": 1,
      "event": "東京・名古屋・大阪の各証券取引所に株式上場",
      "source": null
    },
    {
      "date": "1958/9",
      "importance": 1,
      "event": "港明製造所操業開始",
      "source": null
    },
    {
      "date": "1959/4",
      "importance": 1,
      "event": "桜田製造所廃止",
      "source": null
    },
    {
      "date": "1963/10",
      "importance": 2,
      "event": "供給ガスの熱量を1立方メートル当たり15MJから19MJに変更",
      "source": null
    },
    {
      "date": "1970/10",
      "importance": 1,
      "event": "空見工場操業開始",
      "source": null
    },
    {
      "date": "1974/10",
      "importance": 1,
      "event": "都市ガスお客さま数100万件突破",
      "source": null
    },
    {
      "date": "1976/11",
      "importance": 1,
      "event": "知多工場操業開始",
      "source": null
    },
    {
      "date": "1977/9",
      "importance": 3,
      "event": "知多LNG共同基地操業開始。インドネシアLNG導入開始",
      "source": null
    },
    {
      "date": "1978/6",
      "importance": 3,
      "event": "天然ガス転換開始。熱量を19MJから46MJに変更",
      "source": null
    },
    {
      "date": "1989/9",
      "importance": 2,
      "event": "オーストラリアLNG導入開始",
      "source": null
    },
    {
      "date": "1991/10",
      "importance": 1,
      "event": "四日市工場操業開始",
      "source": null
    },
    {
      "date": "1993/5",
      "importance": 2,
      "event": "天然ガス転換完了",
      "source": null
    },
    {
      "date": "1995/10",
      "importance": 1,
      "event": "マレーシアLNG導入開始",
      "source": null
    },
    {
      "date": "1998/6",
      "importance": 1,
      "event": "港明工場廃止",
      "source": null
    },
    {
      "date": "2000/2",
      "importance": 1,
      "event": "都市ガスお客さま数200万件突破",
      "source": null
    },
    {
      "date": "2000/11",
      "importance": 1,
      "event": "カタールLNG導入開始",
      "source": null
    },
    {
      "date": "2001/5",
      "importance": 1,
      "event": "知多緑浜工場稼動開始",
      "source": null
    },
    {
      "date": "2003/4",
      "importance": 2,
      "event": "合同瓦斯、岐阜瓦斯、岡崎瓦斯を合併",
      "source": null
    },
    {
      "date": "2004/6",
      "importance": 1,
      "event": "空見工場廃止",
      "source": null
    },
    {
      "date": "2008/4",
      "importance": 2,
      "event": "桑名市から一般ガス事業を譲受",
      "source": null
    },
    {
      "date": "2009/10",
      "importance": 1,
      "event": "輸送幹線の環状化完成",
      "source": null
    },
    {
      "date": "2010/2",
      "importance": 1,
      "event": "ロシア（サハリン）LNG導入開始",
      "source": null
    },
    {
      "date": "2012/1",
      "importance": 2,
      "event": "豪州イクシスLNGプロジェクトの権益売買契約を締結",
      "source": null
    },
    {
      "date": "2013/9",
      "importance": 2,
      "event": "伊勢湾横断パイプライン運用開始",
      "source": null
    },
    {
      "date": "2015/9",
      "importance": 1,
      "event": "供給ガスの熱量を46MJから45MJに変更",
      "source": null
    },
    {
      "date": "2016/4",
      "importance": 3,
      "event": "小売電気事業に参入",
      "source": null
    },
    {
      "date": "2018/9",
      "importance": 1,
      "event": "スマートタウン「みなとアクルス」まちびらき",
      "source": null
    },
    {
      "date": "2019/8",
      "importance": 2,
      "event": "アメリカLNG導入開始",
      "source": null
    },
    {
      "date": "2022/4",
      "importance": 3,
      "event": "一般ガス導管事業等を東邦ガスネットワークに承継",
      "source": null
    },
    {
      "date": "2022/4",
      "importance": 1,
      "event": "東京証券取引所プライム市場および名古屋証券取引所プレミア市場に移行",
      "source": null
    }
  ]
}