{
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  "endpoint": "timeline",
  "stock_code": "7007",
  "company_name": "佐世保重工業",
  "content_lang": "ja",
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  "updated": "2026-08-23",
  "license": "© 2026 Yutaka Sugiura. All rights reserved.",
  "attribution": "The社史 (the-shashi.com) — https://the-shashi.com/tse/7007/",
  "source": {
    "primary": [
      "有価証券報告書"
    ],
    "extraction": "有価証券報告書の沿革を基礎に、社史・報道で補完",
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  "timeline": [
    {
      "date": "1946/10",
      "importance": 1,
      "event": "旧佐世保海軍工廠の造船施設を借り受けて佐世保船舶工業を設立",
      "source": "有価証券報告書"
    },
    {
      "date": "1952/4",
      "importance": 3,
      "event": "講和条約の発効により新造船の建造を開始",
      "source": "有価証券報告書"
    },
    {
      "date": "1956/1",
      "importance": 2,
      "event": "大洋漁業と資本・業務提携",
      "source": null
    },
    {
      "date": "1959/4",
      "importance": 1,
      "event": "福岡証券取引所に上場",
      "source": "有価証券報告書"
    },
    {
      "date": "1961/7",
      "importance": 1,
      "event": "佐世保重工業に商号変更",
      "source": "有価証券報告書"
    },
    {
      "date": "1961/8",
      "importance": 1,
      "event": "東京証券取引所市場第一部に上場",
      "source": "有価証券報告書"
    },
    {
      "date": "1962/5",
      "importance": 2,
      "event": "国有財産の払下げにより借用中の施設が社有財産に",
      "source": "有価証券報告書"
    },
    {
      "date": "1962/10",
      "importance": 2,
      "event": "当時世界最大のタンカー日章丸が竣工",
      "source": "有価証券報告書"
    },
    {
      "date": "1966/8",
      "importance": 2,
      "event": "日本鋼管と資本・業務提携",
      "source": null
    },
    {
      "date": "1969/9",
      "importance": 1,
      "event": "第3ドックの拡張工事が完成",
      "source": "有価証券報告書"
    },
    {
      "date": "1973/9",
      "importance": 1,
      "event": "第4ドックの拡張工事が完成",
      "source": "有価証券報告書"
    },
    {
      "date": "1978/6",
      "importance": 3,
      "event": "造船不況による経営危機で坪内寿夫氏が社長に就任",
      "source": null
    },
    {
      "date": "1980/8",
      "importance": 2,
      "event": "原子力船むつの放射線遮蔽改修工事に着手",
      "source": null
    },
    {
      "date": "1986/9",
      "importance": 2,
      "event": "来島どっくグループの解体によりグループを離脱",
      "source": null
    },
    {
      "date": "2009/3",
      "importance": 2,
      "event": "橋梁事業からの撤退を決定",
      "source": "有価証券報告書"
    },
    {
      "date": "2014/9",
      "importance": 3,
      "event": "名村造船所の株式交換による完全子会社化",
      "source": null
    },
    {
      "date": "2014/9",
      "importance": 1,
      "event": "上場廃止",
      "source": null
    },
    {
      "date": "2022/1",
      "importance": 3,
      "event": "新造船事業を休止",
      "source": null
    }
  ]
}