{
  "timeline": [
    {
      "date": "1897/4",
      "category": "会社設立",
      "region": "",
      "importance": 3,
      "event": "大阪瓦斯を設立",
      "detail": "資本金35万円",
      "significance": "大阪における都市ガス供給の起源",
      "source": "有価証券報告書",
      "amount": "資本金35万円"
    },
    {
      "date": "1905/10",
      "category": "設備投資",
      "region": "",
      "importance": 3,
      "event": "大阪市内にガス供給を開始",
      "detail": "",
      "significance": "創業から8年を経てガス供給事業を本格開始",
      "source": "有価証券報告書"
    },
    {
      "date": "1945/10",
      "category": "組織再編",
      "region": "",
      "importance": 3,
      "event": "神戸・京都など14ガス会社を合併",
      "detail": "戦時統合により供給区域が近畿2府4県に拡大",
      "significance": "関西圏全域をカバーする都市ガス会社へ転換した戦時統合",
      "source": "有価証券報告書"
    },
    {
      "date": "1949/6",
      "category": "",
      "region": "",
      "importance": 1,
      "event": "大阪ガスケミカルを設立",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1965/3",
      "category": "",
      "region": "",
      "importance": 1,
      "event": "大阪ガス都市開発を設立",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1970/2",
      "category": "設備投資",
      "region": "",
      "importance": 1,
      "event": "千里中央地区の地域冷暖房営業開始",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1971/10",
      "category": "設備投資",
      "region": "",
      "importance": 2,
      "event": "泉北製造所第一工場稼動開始",
      "detail": "",
      "significance": "LNG受入体制の整備開始",
      "source": "有価証券報告書"
    },
    {
      "date": "1972/12",
      "category": "設備投資",
      "region": "",
      "importance": 4,
      "event": "泉北製造所へブルネイLNG導入開始",
      "detail": "大阪ガスとして初のLNG導入",
      "significance": "東京ガスに続く日本の都市ガス会社のLNG導入。天然ガス転換の起点",
      "source": "有価証券報告書"
    },
    {
      "date": "1975/5",
      "category": "設備投資",
      "region": "",
      "importance": 3,
      "event": "天然ガス転換開始",
      "detail": "石油系ガスから天然ガスへの熱量変更。全顧客のガス機器交換が必要",
      "significance": "約15年をかけた大規模インフラ転換事業の開始",
      "source": "有価証券報告書"
    },
    {
      "date": "1977/8",
      "category": "設備投資",
      "region": "",
      "importance": 1,
      "event": "泉北製造所第二工場稼動開始",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1983/6",
      "category": "",
      "region": "",
      "importance": 1,
      "event": "オージス総研を設立",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1984/3",
      "category": "設備投資",
      "region": "",
      "importance": 2,
      "event": "姫路製造所稼動開始",
      "detail": "",
      "significance": "関西圏西部への供給能力を強化する第2のLNG基地",
      "source": "有価証券報告書"
    },
    {
      "date": "1990/12",
      "category": "設備投資",
      "region": "",
      "importance": 3,
      "event": "天然ガス転換完了",
      "detail": "1975年から約15年をかけて全供給エリアの天然ガス転換を完了",
      "significance": "近畿2府4県にわたる大規模インフラ転換を完遂",
      "source": "有価証券報告書"
    },
    {
      "date": "2005/10",
      "category": "組織再編",
      "region": "",
      "importance": 1,
      "event": "創業100年を迎える",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2007/6",
      "category": "社長交代",
      "region": "",
      "importance": 1,
      "event": "尾崎裕が取締役社長に就任",
      "detail": "芝野博文から交代",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2009/4",
      "category": "設備投資",
      "region": "",
      "importance": 2,
      "event": "泉北天然ガス発電所稼動開始",
      "detail": "",
      "significance": "ガス会社による電力事業参入の布石。IPP事業の国内拠点",
      "source": "有価証券報告書"
    },
    {
      "date": "2013/3",
      "category": "企業買収",
      "region": "米州",
      "importance": 2,
      "event": "海外エネルギー事業への投資を本格化",
      "detail": "セグメント資産が2329億円に拡大",
      "significance": "米国・豪州を中心とした上流権益取得の加速",
      "source": "有価証券報告書"
    },
    {
      "date": "2014/3",
      "category": "",
      "region": "",
      "importance": 1,
      "event": "海外エネルギーセグメントが初の営業赤字",
      "detail": "",
      "significance": "初期投資の負担と資源価格下落の影響",
      "source": "有価証券報告書",
      "amount": "営業損失8億円"
    },
    {
      "date": "2014/6",
      "category": "社長交代",
      "region": "",
      "importance": 1,
      "event": "本荘武宏が代表取締役社長に就任",
      "detail": "尾崎裕から交代",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2015/3",
      "category": "",
      "region": "",
      "importance": 1,
      "event": "海外エネルギーセグメントの赤字が拡大",
      "detail": "",
      "significance": "原油安の影響",
      "source": "有価証券報告書",
      "amount": "営業損失63億円"
    },
    {
      "date": "2016/4",
      "category": "組織再編",
      "region": "",
      "importance": 2,
      "event": "電力小売全面自由化",
      "detail": "家庭向け電力販売に参入",
      "significance": "ガス会社から総合エネルギー企業への転換を促した制度変更",
      "source": ""
    },
    {
      "date": "2017/4",
      "category": "組織再編",
      "region": "",
      "importance": 2,
      "event": "ガス小売全面自由化",
      "detail": "関西電力が家庭用ガス市場に参入",
      "significance": "関西電力との二正面競争の開始",
      "source": ""
    },
    {
      "date": "2020/4",
      "category": "組織再編",
      "region": "",
      "importance": 2,
      "event": "基盤会社3社の事業開始",
      "detail": "大阪ガスマーケティング、Daigasエナジー、Daigasガスアンドパワーソリューション",
      "significance": "グループ経営体制の再編",
      "source": "有価証券報告書"
    },
    {
      "date": "2021/4",
      "category": "組織再編",
      "region": "米州",
      "importance": 2,
      "event": "Osaka Gas USAを海外地域統括会社に位置づけ",
      "detail": "",
      "significance": "米国事業拡大に向けた組織体制の整備",
      "source": "有価証券報告書"
    },
    {
      "date": "2021/4",
      "category": "社長交代",
      "region": "",
      "importance": 2,
      "event": "藤原正隆が代表取締役社長に就任",
      "detail": "本荘武宏から交代",
      "significance": "脱炭素と海外事業拡大を両軸に据えた経営を推進",
      "source": "有価証券報告書"
    },
    {
      "date": "2022/4",
      "category": "組織再編",
      "region": "",
      "importance": 3,
      "event": "大阪ガスネットワークの事業開始",
      "detail": "ガス導管事業を分社化",
      "significance": "ガス事業法改正に伴う法的分離への対応とホールディングス型経営への布石",
      "source": "有価証券報告書"
    },
    {
      "date": "2024/3",
      "category": "",
      "region": "",
      "importance": 2,
      "event": "経常利益2266億円と過去最高益",
      "detail": "海外エネルギーの利益拡大が寄与",
      "significance": "シェールガス・米国IPP事業の利益貢献が本格化",
      "source": "有価証券報告書",
      "amount": "経常利益2266億円、純利益1327億円"
    }
  ]
}