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  "updated": "2026-10-27",
  "license": "© 2026 Yutaka Sugiura. All rights reserved.",
  "attribution": "The社史 (the-shashi.com) — https://the-shashi.com/tse/6306/decisions/",
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  "title": "日工の歴史概略",
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      "title": "日本工具製作の設立と大証上場",
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    {
      "title": "新潟鐵工所・三菱重工業からの事業譲受とコンクリートポンプ参入",
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      "end_year": 2026,
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}
