{
  "timeline": [
    {
      "date": "1961/7",
      "category": "会社設立",
      "region": "",
      "importance": 3,
      "event": "東京都千代田区に大塚商会を創業",
      "detail": "複写機及びサプライ商品の販売を目的として大塚實氏が創業",
      "significance": "オフィス機器商社の起点",
      "source": "有価証券報告書"
    },
    {
      "date": "1961/12",
      "category": "会社設立",
      "region": "",
      "importance": 3,
      "event": "法人組織に改め、株式会社大塚商会を設立",
      "detail": "",
      "significance": "法人化",
      "source": "有価証券報告書"
    },
    {
      "date": "1965/3",
      "category": "設備投資",
      "region": "",
      "importance": 1,
      "event": "大阪支店を開設",
      "detail": "",
      "significance": "二大都市拠点体制の基礎",
      "source": "有価証券報告書"
    },
    {
      "date": "1970/8",
      "category": "新規事業",
      "region": "",
      "importance": 3,
      "event": "電算機事業を開始",
      "detail": "",
      "significance": "オフィス機器商社からIT商社への転換",
      "source": "有価証券報告書"
    },
    {
      "date": "1979/10",
      "category": "新規事業|研究開発",
      "region": "",
      "importance": 3,
      "event": "自社開発の業務用パッケージソフト「SMILE」販売開始",
      "detail": "中小企業向け業務ソフトの先駆け",
      "significance": "自社開発ソフト事業の起点。後の OSK の中核",
      "source": "有価証券報告書"
    },
    {
      "date": "1981/7",
      "category": "新規事業",
      "region": "",
      "importance": 2,
      "event": "パソコン及びワープロ専用機の販売開始",
      "detail": "",
      "significance": "PC 商材取扱いの起点",
      "source": "有価証券報告書"
    },
    {
      "date": "1982/5",
      "category": "新規事業",
      "region": "",
      "importance": 2,
      "event": "OAセンターの地区展開及び教育ビジネスを開始",
      "detail": "",
      "significance": "オフィス自動化提案＋教育の組み合わせ",
      "source": "有価証券報告書"
    },
    {
      "date": "1984/2",
      "category": "新規事業",
      "region": "",
      "importance": 2,
      "event": "CADシステム事業を開始",
      "detail": "",
      "significance": "設計支援領域への参入",
      "source": "有価証券報告書"
    },
    {
      "date": "1984/7",
      "category": "組織再編",
      "region": "",
      "importance": 2,
      "event": "大塚システムエンジニアリング(現OSK)を設立",
      "detail": "",
      "significance": "ソフト開発機能の子会社化",
      "source": "有価証券報告書"
    },
    {
      "date": "1987/7",
      "category": "新規事業",
      "region": "",
      "importance": 2,
      "event": "ネットワーク事業を開始",
      "detail": "",
      "significance": "SI 商社化の起点",
      "source": "有価証券報告書"
    },
    {
      "date": "1990/4",
      "category": "新規事業",
      "region": "",
      "importance": 3,
      "event": "たよれーる保守サービス開始",
      "detail": "企業向け会員制サポート",
      "significance": "中堅中小企業向けトータルサポートの源流",
      "source": "有価証券報告書"
    },
    {
      "date": "1995/6",
      "category": "新規事業|IT投資",
      "region": "",
      "importance": 2,
      "event": "商用インターネット接続サービスα-Web開始",
      "detail": "",
      "significance": "ISP事業参入",
      "source": "有価証券報告書"
    },
    {
      "date": "1997/8",
      "category": "海外進出",
      "region": "中国",
      "importance": 1,
      "event": "台湾に震旦大塚股份有限公司を設立",
      "detail": "大塚資訊科技股份有限公司の前身",
      "significance": "中華圏拠点開設",
      "source": "有価証券報告書"
    },
    {
      "date": "1999/2",
      "category": "新規事業",
      "region": "",
      "importance": 3,
      "event": "会員制通信販売「たのメール」販売開始",
      "detail": "オフィス用品のカタログ通販",
      "significance": "たのめーる事業の起点",
      "source": "有価証券報告書"
    },
    {
      "date": "2000/7",
      "category": "株式上場",
      "region": "",
      "importance": 3,
      "event": "東京証券取引所市場第一部に株式上場",
      "detail": "",
      "significance": "公開市場での評価獲得",
      "source": "有価証券報告書"
    },
    {
      "date": "2000/7",
      "category": "設備投資|IT投資",
      "region": "",
      "importance": 2,
      "event": "大塚インターネットデータセンター開設",
      "detail": "",
      "significance": "データセンター事業の起点",
      "source": "有価証券報告書"
    },
    {
      "date": "2003/2",
      "category": "設備投資",
      "region": "",
      "importance": 1,
      "event": "東京都千代田区に本社ビル竣工し移転",
      "detail": "",
      "significance": "本社機能集約",
      "source": "有価証券報告書"
    },
    {
      "date": "2006/4",
      "category": "海外進出",
      "region": "中国",
      "importance": 1,
      "event": "欧智卡信息系統商貿(上海)有限公司設立",
      "detail": "",
      "significance": "中国本土拠点開設",
      "source": "有価証券報告書"
    },
    {
      "date": "2006/8",
      "category": "組織再編|チャネル改革",
      "region": "",
      "importance": 2,
      "event": "サービス＆サポート事業をたのめーると たよれーるの2大ブランドに集約",
      "detail": "",
      "significance": "ストック型サブスクの2軸明確化",
      "source": "有価証券報告書"
    },
    {
      "date": "2015/10",
      "category": "組織再編",
      "region": "",
      "importance": 2,
      "event": "OSK とアルファシステムを合併",
      "detail": "",
      "significance": "ソフト開発機能の統合",
      "source": "有価証券報告書"
    },
    {
      "date": "2020/12",
      "category": "構造改革|IT投資",
      "region": "",
      "importance": 2,
      "event": "DX 推進委員会を設置",
      "detail": "",
      "significance": "社内DX体制強化",
      "source": "有価証券報告書"
    },
    {
      "date": "2021/4",
      "category": "構造改革",
      "region": "",
      "importance": 2,
      "event": "DX 認定取得事業者として認定取得",
      "detail": "経済産業省指針",
      "significance": "DX 推進企業として外部認定",
      "source": "有価証券報告書"
    },
    {
      "date": "2022/4",
      "category": "株式上場",
      "region": "",
      "importance": 3,
      "event": "東京証券取引所プライム市場に移行",
      "detail": "",
      "significance": "市場区分再編に対応",
      "source": "有価証券報告書"
    },
    {
      "date": "2023/7",
      "category": "経営計画",
      "region": "",
      "importance": 2,
      "event": "中・長期経営方針を発表",
      "detail": "",
      "significance": "中期方針の明確化",
      "source": "有価証券報告書"
    }
  ]
}