{
  "timeline": [
    {
      "date": "1955/4",
      "category": "会社設立",
      "region": "",
      "importance": 5,
      "event": "大和ハウス工業を創業",
      "detail": "石橋信夫が大阪で創業。戦後の木材不足を背景に鋼管構造建築を考案",
      "significance": "プレハブ住宅産業の先駆け。「建築の工業化」に先鞭をつけた",
      "source": "有価証券報告書"
    },
    {
      "date": "1955/4",
      "category": "",
      "region": "",
      "importance": 4,
      "event": "創業商品「パイプハウス」を発売",
      "detail": "鋼管（パイプ）構造による建築の考案",
      "significance": "鉄パイプを柱に使う常識破りの発想が、プレハブ建築の原点となった",
      "source": "有価証券報告書"
    },
    {
      "date": "1957/4",
      "category": "",
      "region": "",
      "importance": 1,
      "event": "日本軽量鉄骨建築協会より構造認定書を取得",
      "detail": "我が国初の鋼管構造建築として認定",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1959/6",
      "category": "",
      "region": "",
      "importance": 1,
      "event": "大和工商（現・大和リース）を設立",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1959/8",
      "category": "",
      "region": "",
      "importance": 1,
      "event": "大和梱包（現・大和物流）を設立",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1959/10",
      "category": "株式上場",
      "region": "",
      "importance": 2,
      "event": "東京・大阪市場で株式公開",
      "detail": "店頭承認銘柄として公開",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1959/10",
      "category": "",
      "region": "",
      "importance": 5,
      "event": "「ミゼットハウス」を発売",
      "detail": "第1次ベビーブームによる住宅不足の解消。3時間で建つ家として開発",
      "significance": "日本のプレハブ住宅の礎。子どもたちの声をヒントに開発され、住宅産業の工業化を象徴する製品となった",
      "source": "有価証券報告書"
    },
    {
      "date": "1960/10",
      "category": "設備投資",
      "region": "",
      "importance": 1,
      "event": "堺工場を開設",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1961/6",
      "category": "",
      "region": "",
      "importance": 2,
      "event": "大和団地を設立",
      "detail": "宅地造成・分譲マンション事業の母体",
      "significance": "住宅事業の多角化。後に2001年に合併して大和ハウス本体に統合",
      "source": "有価証券報告書"
    },
    {
      "date": "1961/9",
      "category": "株式上場",
      "region": "",
      "importance": 2,
      "event": "大阪証券取引所市場に株式上場",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1961/10",
      "category": "株式上場",
      "region": "",
      "importance": 2,
      "event": "東京証券取引所（現プライム）市場に株式上場",
      "detail": "",
      "significance": "東証・大証への同年上場で資金調達基盤を確立",
      "source": "有価証券報告書"
    },
    {
      "date": "1962/4",
      "category": "",
      "region": "",
      "importance": 3,
      "event": "プレハブ住宅「ダイワハウスＡ型」を発売",
      "detail": "",
      "significance": "本格的なプレハブ住宅量産の開始",
      "source": "有価証券報告書"
    },
    {
      "date": "1962/12",
      "category": "組織再編",
      "region": "",
      "importance": 1,
      "event": "株式額面変更のため旧大和ハウス工業を吸収合併",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1965/3",
      "category": "設備投資",
      "region": "",
      "importance": 2,
      "event": "奈良工場を開設",
      "detail": "初のプレハブ住宅専門工場",
      "significance": "プレハブ住宅の本格量産体制を確立",
      "source": "有価証券報告書"
    },
    {
      "date": "1971/4",
      "category": "",
      "region": "",
      "importance": 1,
      "event": "ダイワ住宅機器（現・デザインアーク）を設立",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1973/11",
      "category": "設備投資",
      "region": "",
      "importance": 1,
      "event": "奈良中央試験所を開設",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1976",
      "category": "",
      "region": "",
      "importance": 4,
      "event": "流通店舗事業を開始",
      "detail": "ロードサイドにおける遊休土地の活用。地主とテナント企業のマッチング",
      "significance": "住宅以外の収益柱を確立した転換点。遊休地活用という新市場を創出し、非住宅部門の比率を大幅に引き上げた",
      "source": "有価証券報告書"
    },
    {
      "date": "1978/2",
      "category": "",
      "region": "",
      "importance": 1,
      "event": "日本住宅流通（現・大和ハウスリアルエステート）を設立",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1978/4",
      "category": "",
      "region": "",
      "importance": 2,
      "event": "リゾートホテル経営を開始",
      "detail": "能登ロイヤルホテルをオープン",
      "significance": "石橋信夫会長主導のレジャー開発。観光事業の原点",
      "source": "有価証券報告書"
    },
    {
      "date": "1980/8",
      "category": "",
      "region": "",
      "importance": 2,
      "event": "ホームセンター事業を開始",
      "detail": "奈良市に第1号店をオープン",
      "significance": "事業多角化の一環。後に2004年にロイヤルホームセンターとして分社化",
      "source": "有価証券報告書"
    },
    {
      "date": "1983/3",
      "category": "",
      "region": "",
      "importance": 1,
      "event": "転宅便（現・大和ライフネクスト）を設立",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1983/5",
      "category": "",
      "region": "中国",
      "importance": 2,
      "event": "中国事業を本格化",
      "detail": "上海市において外国人宿泊用施設を建設",
      "significance": "初の本格海外事業展開",
      "source": "有価証券報告書"
    },
    {
      "date": "1986/1",
      "category": "",
      "region": "",
      "importance": 1,
      "event": "大和情報サービス（現・大和ハウスリアルティマネジメント）を設立",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1989/10",
      "category": "",
      "region": "",
      "importance": 2,
      "event": "大和リビングを設立",
      "detail": "賃貸住宅管理事業の母体",
      "significance": "後に賃貸住宅セグメントの中核子会社に成長",
      "source": "有価証券報告書"
    },
    {
      "date": "1994/9",
      "category": "設備投資",
      "region": "",
      "importance": 1,
      "event": "大和ハウス工業総合技術研究所を開設",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1999/3",
      "category": "設備投資",
      "region": "",
      "importance": 1,
      "event": "大阪・東京の新社屋完成",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2001/4",
      "category": "組織再編",
      "region": "",
      "importance": 3,
      "event": "大和団地と合併",
      "detail": "存続会社は大和ハウス。大和団地の有利子負債1,320億円を引き継ぐ",
      "significance": "マンション事業を本体に統合し、総合住宅メーカーへの転換を加速。一方で創業者の悲願「無借金経営」達成が遠のいた",
      "source": "有価証券報告書",
      "amount": "有利子負債1,320億円承継"
    },
    {
      "date": "2001/6",
      "category": "",
      "region": "",
      "importance": 1,
      "event": "全国13工場及び生産購買本部でISO14001の認証取得",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2003",
      "category": "",
      "region": "",
      "importance": 3,
      "event": "大型物流施設の開発を開始",
      "detail": "ネット社会の到来、物流改革への対応。用地提案から施設運営まで一貫サポート",
      "significance": "EC時代の物流需要を先取り。事業施設セグメントの成長エンジンとなった",
      "source": "有価証券報告書"
    },
    {
      "date": "2004/4",
      "category": "組織再編",
      "region": "",
      "importance": 2,
      "event": "ホームセンター事業をロイヤルホームセンターに会社分割",
      "detail": "",
      "significance": "非中核事業の分社化による経営資源の集中",
      "source": "有価証券報告書"
    },
    {
      "date": "2004/9",
      "category": "企業買収",
      "region": "",
      "importance": 2,
      "event": "大和工商リース（現・大和リース）を連結子会社化",
      "detail": "株式追加取得",
      "significance": "グループ再編の一環",
      "source": "有価証券報告書"
    },
    {
      "date": "2005/5",
      "category": "経営計画",
      "region": "",
      "importance": 1,
      "event": "大和ハウスグループ中期経営計画を策定",
      "detail": "第1次中計",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2006/8",
      "category": "企業買収",
      "region": "",
      "importance": 2,
      "event": "大和工商リース・ダイワラクダ工業・大和物流を完全子会社化",
      "detail": "株式交換",
      "significance": "グループ経営の一体化。主要子会社を完全支配下に置く",
      "source": "有価証券報告書"
    },
    {
      "date": "2007",
      "category": "",
      "region": "",
      "importance": 2,
      "event": "風力発電事業に参入",
      "detail": "「21世紀は風・太陽・水」の事業が必要との考えから",
      "significance": "環境エネルギー事業の起点。後にFY22で独立セグメント化",
      "source": "有価証券報告書"
    },
    {
      "date": "2007/3",
      "category": "組織再編",
      "region": "",
      "importance": 1,
      "event": "リゾートホテル事業を大和リゾートに事業譲渡",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2008/4",
      "category": "企業買収",
      "region": "",
      "importance": 1,
      "event": "小田急建設を持分法適用関連会社化",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2008/5",
      "category": "経営計画",
      "region": "",
      "importance": 1,
      "event": "第2次中期経営計画を策定",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2008/12",
      "category": "企業買収",
      "region": "",
      "importance": 2,
      "event": "ビ・ライフ投資法人（現・大和ハウスリート投資法人）のスポンサーに",
      "detail": "",
      "significance": "不動産ファンド事業への本格参入。REIT運営で資産回転型モデルを確立",
      "source": "有価証券報告書"
    },
    {
      "date": "2009/9",
      "category": "企業買収",
      "region": "",
      "importance": 1,
      "event": "コスモスライフ（現・大和ライフネクスト）を完全子会社化",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2011/11",
      "category": "経営計画",
      "region": "",
      "importance": 1,
      "event": "第3次中期経営計画を策定",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2012/11",
      "category": "株式上場",
      "region": "",
      "importance": 2,
      "event": "大和ハウスリート投資法人が東証に上場",
      "detail": "不動産投資信託証券市場",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2013/1",
      "category": "企業買収",
      "region": "",
      "importance": 4,
      "event": "フジタを完全子会社化",
      "detail": "総合建設会社。海外建設事業の強化",
      "significance": "売上高を一気に拡大（FY13売上高+34.5%）。海外建設・土木のノウハウを取得し、事業施設セグメントの成長を牽引",
      "source": "有価証券報告書"
    },
    {
      "date": "2013/6",
      "category": "企業買収",
      "region": "",
      "importance": 2,
      "event": "コスモスイニシアを連結子会社化",
      "detail": "マンション分譲会社",
      "significance": "マンション事業の強化",
      "source": "有価証券報告書"
    },
    {
      "date": "2013/11",
      "category": "経営計画",
      "region": "",
      "importance": 1,
      "event": "第4次中期経営計画を策定",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2014/1",
      "category": "",
      "region": "",
      "importance": 2,
      "event": "「xevoΣ（ジーヴォシグマ）」発売",
      "detail": "繰り返し地震に強い住宅。断熱性・耐久性・大空間を実現",
      "significance": "戸建住宅の主力商品。自然災害への備えと長期優良住宅の普及に貢献",
      "source": "有価証券報告書"
    },
    {
      "date": "2016/5",
      "category": "経営計画",
      "region": "",
      "importance": 1,
      "event": "第5次中期経営計画を策定",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2017/2",
      "category": "企業買収",
      "region": "米州",
      "importance": 3,
      "event": "Stanley-Martin Communities（米国）を連結子会社化",
      "detail": "米国戸建住宅事業",
      "significance": "米国住宅市場への本格参入。海外戸建住宅事業のノウハウ取得",
      "source": "有価証券報告書"
    },
    {
      "date": "2018/2",
      "category": "企業買収",
      "region": "その他",
      "importance": 2,
      "event": "Rawson Group（豪州）を連結子会社化",
      "detail": "",
      "significance": "豪州住宅市場への参入",
      "source": "有価証券報告書"
    },
    {
      "date": "2019/5",
      "category": "経営計画",
      "region": "",
      "importance": 1,
      "event": "第6次中期経営計画を策定",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2019/11",
      "category": "組織再編",
      "region": "",
      "importance": 2,
      "event": "ガバナンス強化策を策定",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2020/1",
      "category": "企業買収",
      "region": "米州",
      "importance": 2,
      "event": "Trumark Companies（米国）を連結子会社化",
      "detail": "",
      "significance": "米国住宅事業の拡充",
      "source": "有価証券報告書"
    },
    {
      "date": "2021/1",
      "category": "企業買収",
      "region": "欧州",
      "importance": 2,
      "event": "Flexbuild Holding（現・Daiwa House Modular Europe、オランダ）を連結子会社化",
      "detail": "",
      "significance": "欧州モジュラー建築への参入",
      "source": "有価証券報告書"
    },
    {
      "date": "2021/4",
      "category": "組織再編",
      "region": "",
      "importance": 2,
      "event": "事業本部制の本格運用を開始",
      "detail": "",
      "significance": "セグメント経営の強化",
      "source": "有価証券報告書"
    },
    {
      "date": "2021/9",
      "category": "企業買収",
      "region": "米州",
      "importance": 2,
      "event": "CastleRock Communities（米国）を連結子会社化",
      "detail": "",
      "significance": "米国住宅事業のさらなる拡大",
      "source": "有価証券報告書"
    },
    {
      "date": "2021/10",
      "category": "設備投資",
      "region": "",
      "importance": 1,
      "event": "「大和ハウスグループみらい価値共創センター（コトクリエ）」開所",
      "detail": "奈良県。創業者ゆかりの地",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2022/4",
      "category": "株式上場",
      "region": "",
      "importance": 1,
      "event": "東京証券取引所プライム市場へ移行",
      "detail": "市場再編に伴い",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2022/5",
      "category": "経営計画",
      "region": "",
      "importance": 1,
      "event": "第7次中期経営計画を策定",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2024/1",
      "category": "組織再編",
      "region": "",
      "importance": 1,
      "event": "コーポレートベンチャーキャピタルファンドを設立",
      "detail": "大和ハウスグループ投資事業有限責任組合",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2024/11",
      "category": "業務提携",
      "region": "米州",
      "importance": 2,
      "event": "アライアンス・レジデンシャル社（米国）を持分法適用関連会社化",
      "detail": "Daiwa House USA Member LLC経由",
      "significance": "米国賃貸住宅市場への参入",
      "source": "有価証券報告書"
    }
  ]
}