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  "license": "© 2026 Yutaka Sugiura. All rights reserved.",
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      "source": "有価証券報告書"
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      "date": "1951/4",
      "importance": 3,
      "event": "日本で最初にメカニカルシールを開発し生産を開始",
      "source": "有価証券報告書"
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      "importance": 2,
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      "source": "有価証券報告書"
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      "event": "兵庫県三田市に三田工場を新設",
      "source": "有価証券報告書"
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      "date": "1980/3",
      "importance": 1,
      "event": "日高精工に資本参加",
      "source": "有価証券報告書"
    },
    {
      "date": "1984",
      "importance": 3,
      "event": "半導体製造装置向けふっ素樹脂製品の開発に着手",
      "source": "公式サイト沿革"
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      "date": "1984/5",
      "importance": 2,
      "event": "大阪証券取引所市場第二部特別指定銘柄に上場",
      "source": "有価証券報告書"
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      "date": "1989/10",
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      "event": "京都府福知山市に福知山工場を新設",
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      "importance": 1,
      "event": "大阪証券取引所市場第二部に上場",
      "source": "有価証券報告書"
    },
    {
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      "event": "台湾に合弁会社リエンフーピラーを設立",
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      "event": "熊本県合志市に九州工場を新設",
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      "date": "2020",
      "importance": 2,
      "event": "新・三田工場が竣工",
      "source": "公式サイト沿革"
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    {
      "date": "2020/5",
      "importance": 1,
      "event": "中国にPillar Technology (Chuzhou)を設立",
      "source": "有価証券報告書"
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    {
      "date": "2022/3",
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      "event": "増子製作所を完全子会社化",
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      "date": "2022/4",
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      "event": "タンケンシールセーコウを完全子会社化",
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      "date": "2024/5",
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      "event": "創業100周年を迎える",
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      "date": "2024/7",
      "importance": 3,
      "event": "商号をPILLARに変更",
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