{
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  "stock_code": "268A",
  "company_name": "リガク・ホールディングス",
  "content_lang": "ja",
  "meta_lang": "en",
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  "updated": "2026-08-09",
  "license": "© 2026 Yutaka Sugiura. All rights reserved.",
  "attribution": "The社史 (the-shashi.com) — https://the-shashi.com/tse/268A/",
  "source": {
    "primary": [
      "リガク プレスリリース 2015/3/31",
      "日刊工業新聞 2021/6/22",
      "株式会社リガク プレスリリース 2023/1/25",
      "適時開示 2026/4/21",
      "適時開示 2026/6/1"
    ],
    "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": "1951/12",
      "importance": 3,
      "event": "国産X線装置の製造販売を目的に東京・有楽町で理学電機を設立",
      "source": null
    },
    {
      "date": "1952",
      "importance": 2,
      "event": "回転対陰極型X線発生装置を開発",
      "source": null
    },
    {
      "date": "1954",
      "importance": 2,
      "event": "自動記録式X線回折装置を開発",
      "source": null
    },
    {
      "date": "1957",
      "importance": 2,
      "event": "自動記録式熱分析装置を開発",
      "source": null
    },
    {
      "date": "1960/2",
      "importance": 1,
      "event": "東京都昭島市松原町に拝島工場を新設",
      "source": null
    },
    {
      "date": "1961/5",
      "importance": 2,
      "event": "大阪府高槻市赤大路町に理学電機工業を設立",
      "source": null
    },
    {
      "date": "1971/10",
      "importance": 2,
      "event": "米国マサチューセッツ州に営業所 Rigaku USA を開設",
      "source": null
    },
    {
      "date": "1972/3",
      "importance": 1,
      "event": "Rigaku USA を支店に格上げ",
      "source": null
    },
    {
      "date": "1972/7",
      "importance": 1,
      "event": "Rigaku USA を法人化し Rigaku USA, Inc. を設立",
      "source": null
    },
    {
      "date": "1975/7",
      "importance": 1,
      "event": "東京都西多摩郡羽村町に理学流通サービスセンターを設立",
      "source": null
    },
    {
      "date": "1978",
      "importance": 2,
      "event": "超強力X線発生装置 RU-1500 を開発",
      "source": null
    },
    {
      "date": "1978/6",
      "importance": 1,
      "event": "東京都文京区本郷に日本インスツルメンツを設立",
      "source": null
    },
    {
      "date": "1980/5",
      "importance": 1,
      "event": "東京都西多摩郡瑞穂町に理学瑞穂製作所を設立",
      "source": null
    },
    {
      "date": "1983/7",
      "importance": 1,
      "event": "大阪府高槻市赤大路町に理学サービスを設立",
      "source": null
    },
    {
      "date": "1985/4",
      "importance": 1,
      "event": "理学瑞穂製作所を東京都武蔵村山市伊奈平へ移転",
      "source": null
    },
    {
      "date": "1986/9",
      "importance": 1,
      "event": "東京都昭島市松原町にリガクを設立",
      "source": null
    },
    {
      "date": "1989/2",
      "importance": 1,
      "event": "東京都昭島市松原町に理学メカトロニクスを設立",
      "source": null
    },
    {
      "date": "1990/10",
      "importance": 1,
      "event": "山梨県北杜市須玉町に須玉工場を新設",
      "source": null
    },
    {
      "date": "1992/4",
      "importance": 1,
      "event": "東京都昭島市松原町にリガクX線研究所を新設",
      "source": null
    },
    {
      "date": "1996/4",
      "importance": 2,
      "event": "米国テキサス州の Molecular Structure Corporation を買収",
      "source": null
    },
    {
      "date": "2000/3",
      "importance": 2,
      "event": "米国の Osmic, Inc. を買収",
      "source": null
    },
    {
      "date": "2001/3",
      "importance": 1,
      "event": "Rigaku USA が MSC を統合し Rigaku/MSC に商号変更",
      "source": null
    },
    {
      "date": "2004/4",
      "importance": 3,
      "event": "理学電機がリガクを統合し社名をリガクへ変更",
      "source": null
    },
    {
      "date": "2006/3",
      "importance": 1,
      "event": "Osmic を Rigaku Innovative Technologies に商号変更",
      "source": null
    },
    {
      "date": "2008/5",
      "importance": 1,
      "event": "チェコ・プラハに Rigaku Innovative Technologies Europe を設立",
      "source": null
    },
    {
      "date": "2008/10",
      "importance": 2,
      "event": "リガクが理学電機工業を統合",
      "source": null
    },
    {
      "date": "2009/3",
      "importance": 1,
      "event": "中国北京市に理学電企儀器（北京）を設立",
      "source": null
    },
    {
      "date": "2009/4",
      "importance": 1,
      "event": "米国テキサス州に Applied Rigaku Technologies を設立",
      "source": null
    },
    {
      "date": "2009/4",
      "importance": 1,
      "event": "理学瑞穂製作所をリガク山梨に商号変更し山梨工場内へ移転",
      "source": null
    },
    {
      "date": "2010/2",
      "importance": 1,
      "event": "米国の Newton Scientific を買収",
      "source": null
    },
    {
      "date": "2010/3",
      "importance": 1,
      "event": "中国香港に Rigaku Asia and Pacific を設立",
      "source": null
    },
    {
      "date": "2010/5",
      "importance": 1,
      "event": "ドイツ・ベルリンに Rigaku Europe SE を設立",
      "source": null
    },
    {
      "date": "2011/10",
      "importance": 1,
      "event": "米国カリフォルニア州に Rigaku Raman Technologies を設立",
      "source": null
    },
    {
      "date": "2013/6",
      "importance": 1,
      "event": "ブラジル・サンパウロ市に Rigaku Latin America を設立",
      "source": null
    },
    {
      "date": "2014/1",
      "importance": 1,
      "event": "米国テキサス州に Rigaku Americas Holdings Company を設立",
      "source": null
    },
    {
      "date": "2015/4",
      "importance": 1,
      "event": "ポーランド・ヴロツワフに Rigaku Polska を設立",
      "source": null
    },
    {
      "date": "2015/5",
      "importance": 2,
      "event": "アジレント・テクノロジーズのX線回折事業を買収",
      "source": "リガク プレスリリース 2015/3/31"
    },
    {
      "date": "2016/6",
      "importance": 1,
      "event": "シンガポールに Rigaku Asia Pacific を設立",
      "source": null
    },
    {
      "date": "2019/7",
      "importance": 3,
      "event": "イスラエルの XwinSys Technology Development を買収",
      "source": null,
      "link": "/tse/268A/decisions/xwinsys-semiconductor-metrology-2019/"
    },
    {
      "date": "2020/12",
      "importance": 1,
      "event": "Atom Investment が東京・丸の内にアトム・ホールディングスを設立",
      "source": null
    },
    {
      "date": "2021/3",
      "importance": 3,
      "event": "アトム・ホールディングスがリガク株の過半を取得",
      "source": null,
      "link": "/tse/268A/decisions/carlyle-joint-investment-2021/"
    },
    {
      "date": "2021/4",
      "importance": 2,
      "event": "株式交換によるリガクの完全子会社化",
      "source": null
    },
    {
      "date": "2021/6",
      "importance": 1,
      "event": "本社を東京都昭島市松原町へ移転",
      "source": null
    },
    {
      "date": "2021/6",
      "importance": 2,
      "event": "志村晶社長が会長へ退き池田俊幸氏が社長に就任",
      "source": "日刊工業新聞 2021/6/22"
    },
    {
      "date": "2021/8",
      "importance": 2,
      "event": "オランダの MILabs を買収",
      "source": null
    },
    {
      "date": "2022/1",
      "importance": 1,
      "event": "リガクが理学メカトロニクスと理学サービスを統合",
      "source": null
    },
    {
      "date": "2022/4",
      "importance": 1,
      "event": "英国マーシーサイド州に Rigaku UK を設立",
      "source": null
    },
    {
      "date": "2022/7",
      "importance": 1,
      "event": "リガクがリガク山梨を統合",
      "source": null
    },
    {
      "date": "2023/1",
      "importance": 1,
      "event": "フランス・ストラスブール市に Rigaku France を設立",
      "source": null
    },
    {
      "date": "2023/2",
      "importance": 2,
      "event": "川上潤氏が代表取締役社長に就任",
      "source": "株式会社リガク プレスリリース 2023/1/25"
    },
    {
      "date": "2023/4",
      "importance": 1,
      "event": "Rigaku Latin America を閉鎖",
      "source": null
    },
    {
      "date": "2023/8",
      "importance": 1,
      "event": "中国上海市に理学電企（上海）儀器を設立",
      "source": null
    },
    {
      "date": "2023/9",
      "importance": 1,
      "event": "ブラジル・サンパウロ市に Rigaku do Brasil を設立",
      "source": null
    },
    {
      "date": "2023/9",
      "importance": 1,
      "event": "インド・ムンバイ市に Rigaku India を設立",
      "source": null
    },
    {
      "date": "2023/12",
      "importance": 2,
      "event": "米国5社を Rigaku Americas Holding へ吸収合併",
      "source": null
    },
    {
      "date": "2024/1",
      "importance": 1,
      "event": "台湾に支店として理学科技台灣分公司を設立",
      "source": null
    },
    {
      "date": "2024/3",
      "importance": 1,
      "event": "中南米の営業部門を Rigaku do Brasil へ移管",
      "source": null
    },
    {
      "date": "2024/10",
      "importance": 3,
      "event": "東京証券取引所プライム市場に上場",
      "source": null
    },
    {
      "date": "2025/5",
      "importance": 1,
      "event": "台湾新竹県に理学股分有限公司を設立",
      "source": null
    },
    {
      "date": "2026/4",
      "importance": 3,
      "event": "米 Onto Innovation との資本業務提携と株式27%の譲渡合意",
      "source": "適時開示 2026/4/21",
      "link": "/tse/268A/decisions/onto-innovation-alliance-2026/"
    },
    {
      "date": "2026/6",
      "importance": 2,
      "event": "Atom Investment による株式2,958万株の売出し",
      "source": "適時開示 2026/6/1"
    }
  ]
}