{
  "timeline": [
    {
      "date": "1949/1",
      "category": "会社設立",
      "region": "",
      "importance": 3,
      "event": "創業者三井孝昭が福岡県八幡市で金型の製造販売業を開始",
      "detail": "北九州市八幡西区黒崎で個人事業として始動",
      "significance": "三井ハイテックの起源",
      "source": "有価証券報告書"
    },
    {
      "date": "1954/3",
      "category": "研究開発",
      "region": "",
      "importance": 1,
      "event": "熱処理後総研削仕上げ金型1号機を納入",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1957/4",
      "category": "会社設立",
      "region": "",
      "importance": 3,
      "event": "資本金150万円で株式会社三井工作所を設立",
      "detail": "",
      "significance": "個人事業から法人化",
      "source": "有価証券報告書",
      "amount": "150万円"
    },
    {
      "date": "1958/12",
      "category": "研究開発",
      "region": "",
      "importance": 2,
      "event": "タングステンカーバイド金型（ノッチング型）を開発",
      "detail": "",
      "significance": "超硬合金金型へ参入",
      "source": "有価証券報告書"
    },
    {
      "date": "1959/5",
      "category": "新規事業",
      "region": "",
      "importance": 3,
      "event": "モーターコア用タングステンカーバイド精密順送り金型の製造販売を開始",
      "detail": "",
      "significance": "主力事業モーターコアの起点",
      "source": "有価証券報告書"
    },
    {
      "date": "1960/10",
      "category": "設備投資",
      "region": "",
      "importance": 2,
      "event": "小嶺工場（現本社・八幡事業所）を新設",
      "detail": "北九州市八幡西区小嶺",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1961/4",
      "category": "新規事業",
      "region": "",
      "importance": 1,
      "event": "平面研削盤の量産化体制を整え外販を開始",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1966/5",
      "category": "研究開発",
      "region": "",
      "importance": 2,
      "event": "ICリードフレーム打抜き用のタングステンカーバイド試作金型を開発",
      "detail": "",
      "significance": "リードフレーム事業の前段",
      "source": "有価証券報告書"
    },
    {
      "date": "1966/8",
      "category": "海外進出",
      "region": "米州",
      "importance": 2,
      "event": "米国イリノイ州にシカゴ事務所を開設",
      "detail": "",
      "significance": "初の海外拠点",
      "source": "有価証券報告書"
    },
    {
      "date": "1969/6",
      "category": "新規事業",
      "region": "",
      "importance": 3,
      "event": "ICリードフレームの製造販売を開始",
      "detail": "",
      "significance": "半導体実装部品事業の起点",
      "source": "有価証券報告書"
    },
    {
      "date": "1972/4",
      "category": "海外進出",
      "region": "米州",
      "importance": 2,
      "event": "米国イリノイ州にインターナショナル・リードフレーム・コーポレーションを設立",
      "detail": "1980年1月閉鎖",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1972/12",
      "category": "海外進出",
      "region": "東南アジア",
      "importance": 3,
      "event": "シンガポールにミツイ・マニュファクチュアリング（シンガポール）を設立",
      "detail": "現ミツイ・ハイテック（シンガポール）",
      "significance": "東南アジア生産拠点の起点",
      "source": "有価証券報告書"
    },
    {
      "date": "1973/1",
      "category": "海外進出",
      "region": "中国",
      "importance": 2,
      "event": "香港にミツイ・マニュファクチュアリング（ホンコン）を設立",
      "detail": "2026年1月清算",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1974/8",
      "category": "研究開発",
      "region": "",
      "importance": 2,
      "event": "MACシステム（積層鉄芯金型内自動結束装置）を開発",
      "detail": "",
      "significance": "モーターコア技術の差別化",
      "source": "有価証券報告書"
    },
    {
      "date": "1979/10",
      "category": "新規事業",
      "region": "",
      "importance": 2,
      "event": "ICリードフレームのめっき事業を開始",
      "detail": "自動連続スポットめっき装置を開発",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1980/1",
      "category": "海外進出",
      "region": "米州",
      "importance": 2,
      "event": "米国カリフォルニア州にインターナショナル・リードフレーム・コーポレーションを設立",
      "detail": "1999年4月にミツイ・ハイテック（USA）に改称、2023年7月清算",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1980/3",
      "category": "海外進出",
      "region": "米州",
      "importance": 1,
      "event": "米国イリノイ州にミツイ・プレシジョン・マシーナリー・コーポレーションを設立",
      "detail": "2003年2月吸収合併",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1984/5",
      "category": "",
      "region": "",
      "importance": 1,
      "event": "商号を株式会社三井ハイテックに変更",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1984/7",
      "category": "新規事業",
      "region": "",
      "importance": 2,
      "event": "IC組立事業を開始",
      "detail": "2018年10月に清算",
      "significance": "後に撤退する事業の開始",
      "source": "有価証券報告書"
    },
    {
      "date": "1984/9",
      "category": "株式上場",
      "region": "",
      "importance": 3,
      "event": "福岡証券取引所に株式を上場",
      "detail": "",
      "significance": "初の株式公開",
      "source": "有価証券報告書"
    },
    {
      "date": "1985/9",
      "category": "株式上場",
      "region": "",
      "importance": 3,
      "event": "東京証券取引所市場第二部に株式を上場",
      "detail": "",
      "significance": "東証上場",
      "source": "有価証券報告書"
    },
    {
      "date": "1987/1",
      "category": "海外進出",
      "region": "東南アジア",
      "importance": 2,
      "event": "マレーシアにミツイ・ハイテック（マレーシア）を設立",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1987/4",
      "category": "新規事業",
      "region": "",
      "importance": 1,
      "event": "金型部品の外販を開始",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1991/6",
      "category": "企業買収",
      "region": "",
      "importance": 1,
      "event": "株式会社三井電器の株式を取得し子会社化",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1991/7",
      "category": "株式上場",
      "region": "",
      "importance": 3,
      "event": "東京証券取引所市場第一部に株式を上場",
      "detail": "",
      "significance": "東証一部昇格",
      "source": "有価証券報告書"
    },
    {
      "date": "1993/12",
      "category": "海外進出",
      "region": "中国",
      "importance": 1,
      "event": "中国に北京事務所を開設",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1994/7",
      "category": "海外進出",
      "region": "中国",
      "importance": 2,
      "event": "中国に三井高科技（天津）有限公司を設立",
      "detail": "",
      "significance": "中国本格進出",
      "source": "有価証券報告書"
    },
    {
      "date": "1996/3",
      "category": "海外進出",
      "region": "中国",
      "importance": 1,
      "event": "中国に三井高科技（上海）有限公司を設立",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1997/1",
      "category": "海外進出",
      "region": "東南アジア",
      "importance": 1,
      "event": "シンガポールにミツイ・アジア・ヘッドクォーターズを設立",
      "detail": "",
      "significance": "アジア統括拠点",
      "source": "有価証券報告書"
    },
    {
      "date": "1997/9",
      "category": "海外進出",
      "region": "米州",
      "importance": 1,
      "event": "米国にエムエイチティ・アメリカ・ホールディングスを設立",
      "detail": "2023年7月清算",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1998/10",
      "category": "海外進出",
      "region": "中国",
      "importance": 1,
      "event": "台湾にミツイ・ハイテック（タイワン）を設立",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1999/6",
      "category": "海外進出",
      "region": "欧州",
      "importance": 1,
      "event": "イタリアにミラノ事務所を開設",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1999/12",
      "category": "海外進出",
      "region": "東南アジア",
      "importance": 1,
      "event": "タイにミツイ・ハイテック（タイランド）を設立",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2002/9",
      "category": "海外進出",
      "region": "中国",
      "importance": 1,
      "event": "中国に三井高科技（広東）有限公司を設立",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2003/2",
      "category": "組織再編",
      "region": "",
      "importance": 1,
      "event": "株式会社三井スタンピングを設立",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2007/11",
      "category": "",
      "region": "",
      "importance": 1,
      "event": "門司税関から特定輸出業者として認定",
      "detail": "九州本社企業として初",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2012/1",
      "category": "研究開発",
      "region": "",
      "importance": 1,
      "event": "マグネットモールド®の商標登録",
      "detail": "登録番号5466790",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2013/6",
      "category": "研究開発",
      "region": "",
      "importance": 1,
      "event": "Magnet Mold®の商標登録",
      "detail": "登録番号5588240",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2015/1",
      "category": "海外進出",
      "region": "米州",
      "importance": 2,
      "event": "カナダにミツイ・ハイテック（カナダ）を設立",
      "detail": "",
      "significance": "北米EV需要見据えた拠点",
      "source": "有価証券報告書"
    },
    {
      "date": "2017/2",
      "category": "組織再編",
      "region": "",
      "importance": 1,
      "event": "株式会社三井電器を吸収合併し阿蘇事業所と改称",
      "detail": "",
      "significance": "グループ再編",
      "source": "有価証券報告書"
    },
    {
      "date": "2018/9",
      "category": "海外進出",
      "region": "欧州",
      "importance": 3,
      "event": "ポーランドにミツイ・ハイテック（ヨーロッパ）を設立",
      "detail": "",
      "significance": "欧州EV需要への布石",
      "source": "有価証券報告書"
    },
    {
      "date": "2018/11",
      "category": "設備投資",
      "region": "",
      "importance": 2,
      "event": "岐阜県可児市に岐阜事業所を新設",
      "detail": "",
      "significance": "国内モーターコア増産拠点",
      "source": "有価証券報告書"
    },
    {
      "date": "2022/4",
      "category": "株主対応",
      "region": "",
      "importance": 2,
      "event": "東京証券取引所プライム市場へ移行",
      "detail": "",
      "significance": "市場区分再編対応",
      "source": "有価証券報告書"
    },
    {
      "date": "2023/8",
      "category": "海外進出|設備投資",
      "region": "米州",
      "importance": 3,
      "event": "アメリカにミツイ・ハイテック ノースアメリカを設立",
      "detail": "",
      "significance": "北米EV需要への増強",
      "source": "有価証券報告書"
    },
    {
      "date": "2024/12",
      "category": "海外進出|設備投資",
      "region": "欧州",
      "importance": 3,
      "event": "ドイツにミツイ・ハイテック ドイチュランドを設立",
      "detail": "",
      "significance": "欧州EV需要への増強",
      "source": "有価証券報告書"
    }
  ]
}