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  "license": "© 2026 Yutaka Sugiura. All rights reserved.",
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      "date": "1917/12",
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      "event": "神奈川県高座郡茅ヶ崎町で相模鉄道を創立",
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      "date": "1931/4",
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      "source": "有価証券報告書"
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      "date": "1943/4",
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      "event": "横浜〜海老名間などを営む神中鉄道を吸収合併",
      "source": "有価証券報告書"
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    {
      "date": "1944/6",
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      "event": "茅ヶ崎〜橋本間を運輸通信省に譲渡",
      "source": "有価証券報告書"
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      "date": "1945/6",
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      "source": "有価証券報告書"
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      "date": "1947/5",
      "importance": 2,
      "event": "東京急行電鉄への委託経営を解除",
      "source": "有価証券報告書"
    },
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      "date": "1949/5",
      "importance": 1,
      "event": "東京証券取引所に上場",
      "source": "有価証券報告書"
    },
    {
      "date": "1950/4",
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      "event": "相模野興業を吸収合併し不動産分譲業を開始",
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      "event": "石油製品販売業を開始",
      "source": "有価証券報告書"
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      "source": "有価証券報告書"
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      "date": "1976/4",
      "importance": 2,
      "event": "いずみ野線（二俣川〜いずみ野間）が開通",
      "source": "有価証券報告書"
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      "date": "1988/5",
      "importance": 1,
      "event": "相鉄ホテルを設立",
      "source": "有価証券報告書"
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    {
      "date": "1998/9",
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      "event": "横浜ベイシェラトンホテル＆タワーズが開業",
      "source": "有価証券報告書"
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      "date": "1999/3",
      "importance": 2,
      "event": "いずみ野線が湘南台まで全線開通",
      "source": "有価証券報告書"
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      "source": "有価証券報告書"
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      "date": "2010/10",
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      "event": "自動車事業を相鉄バスに承継し純粋持株会社体制に移行",
      "source": "公式サイト"
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      "date": "2014/9",
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      "event": "サンルートの全株式を取得",
      "source": "有価証券報告書"
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      "date": "2017/12",
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      "date": "2019/11",
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      "event": "相鉄新横浜線が西谷〜羽沢横浜国大間で開通、JR線と相互直通運転を開始",
      "source": "有価証券報告書"
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    {
      "date": "2022/4",
      "importance": 1,
      "event": "東京証券取引所プライム市場に移行",
      "source": "有価証券報告書"
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      "date": "2023/3",
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      "date": "2024/10",
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      "event": "相鉄クリーンエナジーの全株式を取得",
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