{
  "spec_version": "4",
  "endpoint": "history",
  "stock_code": "6925",
  "company_name": "ウシオ電機",
  "content_lang": "ja",
  "meta_lang": "en",
  "canonical_url": "https://the-shashi.com/tse/6925/decisions/",
  "api_url": "/api/6925/history.json",
  "updated": "2026-09-20",
  "license": "© 2026 Yutaka Sugiura. All rights reserved.",
  "attribution": "The社史 (the-shashi.com) — https://the-shashi.com/tse/6925/decisions/",
  "source": {
    "long_term": {
      "primary": [
        "会社年鑑（1986年版）",
        "会社年鑑（1976年版）",
        "会社年鑑（1971年版）",
        "会社年鑑（1971年版）合併に伴う変則6ヶ月決算（1968年4月〜9月）・誌面注記の実質値",
        "会社年鑑（1986年版）変則6ヶ月決算（1976年10月〜1977年3月）"
      ],
      "extraction": "EDINET の XBRL、kabupro 掲載の旧有価証券報告書、会社年鑑・社史等からの転記",
      "row_field": "reference",
      "caveat": "創業期から現在までを 1 本に繋いだ長期系列のため、年代により出所・単位・連結範囲が変わる。行ごとの reference / unit / consolidation を必ず参照すること"
    }
  },
  "title": "ウシオ電機の歴史概略",
  "eras": [
    {
      "title": "家庭用電球を捨てた268人、クセノンとハロゲンで開いた産業用ランプ",
      "start_year": 1964,
      "end_year": 1973
    },
    {
      "title": "商品の3分の1を捨てた1974年秋と、光学装置への移行",
      "start_year": 1974,
      "end_year": 1989
    },
    {
      "title": "ランプの納入先Christieの買収と半導体光源ギガフォトン",
      "start_year": 1990,
      "end_year": 2004
    },
    {
      "title": "利益を生まない装置事業と、半導体露光用UVランプ85%への回帰",
      "start_year": 2005,
      "end_year": 2026
    }
  ],
  "overview": [
    {
      "label": "創業",
      "text": "1964年3月、ウシオ工業の電球部門が資本金1,250万円で分離独立し、ウシオ電機が発足した。母体は牛尾治朗氏の祖父・牛尾梅吉氏が定額電球を納めるために興した姫路電球で、1932年に日本電球へ改称して国内の電球メーカーの5指に入り、戦後は父の牛尾健治氏が衛星会社をまとめて牛尾工業を設立し、これがのちのウシオ工業にあたる。分離までは一般照明用電球の製造販売が中心だったが、価格競争の激しい家庭用電球を見限り、設立を機にクセノンランプとハロゲンランプの製造を本格化する。移った人員は268人。"
    },
    {
      "label": "決断",
      "text": "残す商品を、耐えられる為替レートで選び直した。1974年9月期は売上高62億3,900万円に達したが、同じ年の秋には原材料費の高騰と円高で翌期が空前の減益になると見込んだ。基準に据えたのは、どの程度の円レートに耐えられる商品かという一点である。相場が1ドル300円前後の時期に1ドル250〜260円で採算の取れなくなる商品をスクラップの対象に選び、主力のハロゲンランプは3,000種から2,000種へ、クセノンランプは500種から300種へ絞った。全社で捨てた商品は3分の1にのぼり、そこに張り付いていた社員の3分の1を新商品の事業化へ移した。1975年2月のソーラシミュレーターと同年3月の紫外線瞬間乾燥照射装置が、光源のメーカーを光学装置のメーカーへ変えた。"
    },
    {
      "label": "現況",
      "text": "絞ると決めた事業が、伸ばすと決めた事業より大きい。2024年5月の新成長戦略は、Visual Imagingを収益改善事業として2023年度の805億円から2026年度に700億円へ縮め、成長事業のIndustrial Processを821億円から1,100億円へ伸ばす配分を置いた。ところが2026年3月期はVisual Imagingが838億円へ増え、Industrial Processは771億円へ減った。連結売上高は1,792億円、営業利益は119億円で、セグメント利益はIndustrial Processが64億円、Visual Imagingが46億円である。装置が売上で光源を上回りながら利益を残さない構造は、2014年度から2018年度にすでに現れていた。"
    },
    {
      "label": "競合",
      "text": "55年前に次いだ相手のランプ事業を、買い取る側になった。1971年の時点でクセノンランプの世界最大手はドイツのオスラムで、ウシオ電機がこれに次いだ。2025年7月に契約したams-OSRAMの産業・エンターテインメント用ランプ事業は2026年3月3日に取得を終え、約500名がグループへ移った。買収後の世界シェアは半導体露光用と液晶露光用のUVランプがともに85%に達した。一方、半導体光源の最先端からは離れた。2011年5月に[コマツ](/tse/6301/)との合弁ギガフォトンの株式を譲渡し、2013年5月にはXTREME technologiesの活動を停止してEUV光源の量産事業から撤退した。成熟したランプで世界シェアを積んだのは、開発で先へ出たからではなく、撤退する同業の事業を引き取ったからである。"
    }
  ],
  "profile": [
    {
      "key": "founding_business",
      "label": "祖業",
      "value": "クセノンランプとハロゲンランプの製造"
    },
    {
      "key": "current_issue",
      "label": "現在の注力課題",
      "value": "露光用光源の拡大と映像装置の収益改善",
      "tags": [
        "M&A",
        "収益改善"
      ]
    }
  ],
  "summary": {
    "description": "ウシオ電機の歴史。1964年、牛尾治朗氏が設立し、映写機や産業用の光源となるランプの製造を手がける。米Christieの映写機部門買収、ギガフォトンの設立、独OSRAM ENIの買収までの沿革と経緯を執筆。"
  },
  "long_term": [
    {
      "year": 1968,
      "month": 3,
      "company_name": "ウシオ電機",
      "consolidation": "単体",
      "accounting_standard": "JGAAP",
      "unit": "億円",
      "sales_jp": "売上高",
      "sales": 12.12,
      "operating_profit_jp": null,
      "operating_profit": null,
      "ordinary_profit_jp": null,
      "ordinary_profit": null,
      "net_profit_jp": "当期純利益",
      "net_profit": 1.68,
      "net_margin": 13.861,
      "employees": null,
      "reference": "会社年鑑（1971年版）"
    },
    {
      "year": 1968,
      "month": 9,
      "company_name": "ウシオ電機",
      "consolidation": "単体",
      "accounting_standard": "JGAAP",
      "unit": "億円",
      "sales_jp": "売上高",
      "sales": 7.3,
      "operating_profit_jp": null,
      "operating_profit": null,
      "ordinary_profit_jp": null,
      "ordinary_profit": null,
      "net_profit_jp": "当期純利益",
      "net_profit": 1.02,
      "net_margin": 13.972,
      "employees": null,
      "reference": "会社年鑑（1971年版）合併に伴う変則6ヶ月決算（1968年4月〜9月）・誌面注記の実質値"
    },
    {
      "year": 1969,
      "month": 9,
      "company_name": "ウシオ電機",
      "consolidation": "単体",
      "accounting_standard": "JGAAP",
      "unit": "億円",
      "sales_jp": "売上高",
      "sales": 18.74,
      "operating_profit_jp": null,
      "operating_profit": null,
      "ordinary_profit_jp": null,
      "ordinary_profit": null,
      "net_profit_jp": "当期純利益",
      "net_profit": 2.17,
      "net_margin": 11.579,
      "employees": null,
      "reference": "会社年鑑（1971年版）"
    },
    {
      "year": 1970,
      "month": 9,
      "company_name": "ウシオ電機",
      "consolidation": "単体",
      "accounting_standard": "JGAAP",
      "unit": "億円",
      "sales_jp": "売上高",
      "sales": 25.3,
      "operating_profit_jp": null,
      "operating_profit": null,
      "ordinary_profit_jp": "経常利益",
      "ordinary_profit": 4.71,
      "net_profit_jp": "当期純利益",
      "net_profit": 3.04,
      "net_margin": 12.015,
      "employees": null,
      "reference": "会社年鑑（1976年版）"
    },
    {
      "year": 1971,
      "month": 9,
      "company_name": "ウシオ電機",
      "consolidation": "単体",
      "accounting_standard": "JGAAP",
      "unit": "億円",
      "sales_jp": "売上高",
      "sales": 26.48,
      "operating_profit_jp": null,
      "operating_profit": null,
      "ordinary_profit_jp": "経常利益",
      "ordinary_profit": 3.07,
      "net_profit_jp": "当期純利益",
      "net_profit": 1.98,
      "net_margin": 7.477,
      "employees": null,
      "reference": "会社年鑑（1976年版）"
    },
    {
      "year": 1972,
      "month": 9,
      "company_name": "ウシオ電機",
      "consolidation": "単体",
      "accounting_standard": "JGAAP",
      "unit": "億円",
      "sales_jp": "売上高",
      "sales": 31.21,
      "operating_profit_jp": null,
      "operating_profit": null,
      "ordinary_profit_jp": "経常利益",
      "ordinary_profit": 3.5,
      "net_profit_jp": "当期純利益",
      "net_profit": 2.11,
      "net_margin": 6.76,
      "employees": null,
      "reference": "会社年鑑（1976年版）"
    },
    {
      "year": 1973,
      "month": 9,
      "company_name": "ウシオ電機",
      "consolidation": "単体",
      "accounting_standard": "JGAAP",
      "unit": "億円",
      "sales_jp": "売上高",
      "sales": 42.42,
      "operating_profit_jp": null,
      "operating_profit": null,
      "ordinary_profit_jp": "経常利益",
      "ordinary_profit": 4.36,
      "net_profit_jp": "当期純利益",
      "net_profit": 2.29,
      "net_margin": 5.398,
      "employees": null,
      "reference": "会社年鑑（1976年版）"
    },
    {
      "year": 1974,
      "month": 9,
      "company_name": "ウシオ電機",
      "consolidation": "単体",
      "accounting_standard": "JGAAP",
      "unit": "億円",
      "sales_jp": "売上高",
      "sales": 62.39,
      "operating_profit_jp": null,
      "operating_profit": null,
      "ordinary_profit_jp": "経常利益",
      "ordinary_profit": 4.3,
      "net_profit_jp": "当期純利益",
      "net_profit": 2.23,
      "net_margin": 3.574,
      "employees": null,
      "reference": "会社年鑑（1976年版）"
    },
    {
      "year": 1975,
      "month": 3,
      "company_name": "ウシオ電機",
      "consolidation": "単体",
      "accounting_standard": "JGAAP",
      "unit": "億円",
      "sales_jp": null,
      "sales": null,
      "operating_profit_jp": null,
      "operating_profit": null,
      "ordinary_profit_jp": null,
      "ordinary_profit": null,
      "net_profit_jp": null,
      "net_profit": null,
      "net_margin": null,
      "employees": null,
      "reference": null
    },
    {
      "year": 1976,
      "month": 9,
      "company_name": "ウシオ電機",
      "consolidation": "単体",
      "accounting_standard": "JGAAP",
      "unit": "億円",
      "sales_jp": "売上高",
      "sales": 60.18,
      "operating_profit_jp": null,
      "operating_profit": null,
      "ordinary_profit_jp": "経常利益",
      "ordinary_profit": 4.59,
      "net_profit_jp": "当期純利益",
      "net_profit": 2.37,
      "net_margin": 3.938,
      "employees": null,
      "reference": "会社年鑑（1986年版）"
    },
    {
      "year": 1977,
      "month": 3,
      "company_name": "ウシオ電機",
      "consolidation": "単体",
      "accounting_standard": "JGAAP",
      "unit": "億円",
      "sales_jp": "売上高",
      "sales": 30.38,
      "operating_profit_jp": null,
      "operating_profit": null,
      "ordinary_profit_jp": "経常利益",
      "ordinary_profit": 2.56,
      "net_profit_jp": "当期純利益",
      "net_profit": 1.3,
      "net_margin": 4.279,
      "employees": null,
      "reference": "会社年鑑（1986年版）変則6ヶ月決算（1976年10月〜1977年3月）"
    },
    {
      "year": 1978,
      "month": 3,
      "company_name": "ウシオ電機",
      "consolidation": "単体",
      "accounting_standard": "JGAAP",
      "unit": "億円",
      "sales_jp": "売上高",
      "sales": 64.74,
      "operating_profit_jp": null,
      "operating_profit": null,
      "ordinary_profit_jp": "経常利益",
      "ordinary_profit": 5.74,
      "net_profit_jp": "当期純利益",
      "net_profit": 2.91,
      "net_margin": 4.494,
      "employees": null,
      "reference": "会社年鑑（1986年版）"
    },
    {
      "year": 1979,
      "month": 3,
      "company_name": "ウシオ電機",
      "consolidation": "単体",
      "accounting_standard": "JGAAP",
      "unit": "億円",
      "sales_jp": "売上高",
      "sales": 80.33,
      "operating_profit_jp": null,
      "operating_profit": null,
      "ordinary_profit_jp": "経常利益",
      "ordinary_profit": 7.14,
      "net_profit_jp": "当期純利益",
      "net_profit": 3.61,
      "net_margin": 4.493,
      "employees": null,
      "reference": "会社年鑑（1986年版）"
    },
    {
      "year": 1980,
      "month": 3,
      "company_name": "ウシオ電機",
      "consolidation": "単体",
      "accounting_standard": "JGAAP",
      "unit": "億円",
      "sales_jp": "売上高",
      "sales": 90.85,
      "operating_profit_jp": null,
      "operating_profit": null,
      "ordinary_profit_jp": "経常利益",
      "ordinary_profit": 9.22,
      "net_profit_jp": "当期純利益",
      "net_profit": 4.63,
      "net_margin": 5.096,
      "employees": null,
      "reference": "会社年鑑（1986年版）"
    },
    {
      "year": 1981,
      "month": 3,
      "company_name": "ウシオ電機",
      "consolidation": "単体",
      "accounting_standard": "JGAAP",
      "unit": "億円",
      "sales_jp": "売上高",
      "sales": 110.66,
      "operating_profit_jp": null,
      "operating_profit": null,
      "ordinary_profit_jp": "経常利益",
      "ordinary_profit": 13.16,
      "net_profit_jp": "当期純利益",
      "net_profit": 6.62,
      "net_margin": 5.982,
      "employees": null,
      "reference": "会社年鑑（1986年版）"
    },
    {
      "year": 1982,
      "month": 3,
      "company_name": "ウシオ電機",
      "consolidation": "単体",
      "accounting_standard": "JGAAP",
      "unit": "億円",
      "sales_jp": "売上高",
      "sales": 131.08,
      "operating_profit_jp": null,
      "operating_profit": null,
      "ordinary_profit_jp": "経常利益",
      "ordinary_profit": 15.86,
      "net_profit_jp": "当期純利益",
      "net_profit": 7.89,
      "net_margin": 6.019,
      "employees": null,
      "reference": "会社年鑑（1986年版）"
    },
    {
      "year": 1983,
      "month": 3,
      "company_name": "ウシオ電機",
      "consolidation": "単体",
      "accounting_standard": "JGAAP",
      "unit": "億円",
      "sales_jp": "売上高",
      "sales": 148.85,
      "operating_profit_jp": null,
      "operating_profit": null,
      "ordinary_profit_jp": "経常利益",
      "ordinary_profit": 19.18,
      "net_profit_jp": "当期純利益",
      "net_profit": 9.66,
      "net_margin": 6.489,
      "employees": null,
      "reference": "会社年鑑（1986年版）"
    },
    {
      "year": 1984,
      "month": 3,
      "company_name": "ウシオ電機",
      "consolidation": "単体",
      "accounting_standard": "JGAAP",
      "unit": "億円",
      "sales_jp": "売上高",
      "sales": 174.68,
      "operating_profit_jp": null,
      "operating_profit": null,
      "ordinary_profit_jp": "経常利益",
      "ordinary_profit": 23.6,
      "net_profit_jp": "当期純利益",
      "net_profit": 11.92,
      "net_margin": 6.823,
      "employees": null,
      "reference": "会社年鑑（1986年版）"
    },
    {
      "year": 1985,
      "month": 3,
      "company_name": "ウシオ電機",
      "consolidation": "単体",
      "accounting_standard": "JGAAP",
      "unit": "億円",
      "sales_jp": "売上高",
      "sales": 210.12,
      "operating_profit_jp": null,
      "operating_profit": null,
      "ordinary_profit_jp": "経常利益",
      "ordinary_profit": 31.15,
      "net_profit_jp": "当期純利益",
      "net_profit": 14.61,
      "net_margin": 6.953,
      "employees": null,
      "reference": "会社年鑑（1986年版）"
    },
    {
      "year": 1986,
      "month": 3,
      "company_name": "ウシオ電機",
      "consolidation": "単体",
      "accounting_standard": "JGAAP",
      "unit": "億円",
      "sales_jp": null,
      "sales": null,
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      "operating_profit": null,
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      "ordinary_profit": null,
      "net_profit_jp": null,
      "net_profit": null,
      "net_margin": null,
      "employees": null,
      "reference": null
    },
    {
      "year": 1987,
      "month": 3,
      "company_name": "ウシオ電機",
      "consolidation": "単体",
      "accounting_standard": "JGAAP",
      "unit": "億円",
      "sales_jp": null,
      "sales": null,
      "operating_profit_jp": null,
      "operating_profit": null,
      "ordinary_profit_jp": null,
      "ordinary_profit": null,
      "net_profit_jp": null,
      "net_profit": null,
      "net_margin": null,
      "employees": null,
      "reference": null
    },
    {
      "year": 1988,
      "month": 3,
      "company_name": "ウシオ電機",
      "consolidation": "単体",
      "accounting_standard": "JGAAP",
      "unit": "億円",
      "sales_jp": null,
      "sales": null,
      "operating_profit_jp": null,
      "operating_profit": null,
      "ordinary_profit_jp": null,
      "ordinary_profit": null,
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      "employees": null,
      "reference": null
    },
    {
      "year": 1989,
      "month": 3,
      "company_name": "ウシオ電機",
      "consolidation": "単体",
      "accounting_standard": "JGAAP",
      "unit": "億円",
      "sales_jp": null,
      "sales": null,
      "operating_profit_jp": null,
      "operating_profit": null,
      "ordinary_profit_jp": null,
      "ordinary_profit": null,
      "net_profit_jp": null,
      "net_profit": null,
      "net_margin": null,
      "employees": null,
      "reference": null
    },
    {
      "year": 1990,
      "month": 3,
      "company_name": "ウシオ電機",
      "consolidation": "単体",
      "accounting_standard": "JGAAP",
      "unit": "億円",
      "sales_jp": null,
      "sales": null,
      "operating_profit_jp": null,
      "operating_profit": null,
      "ordinary_profit_jp": null,
      "ordinary_profit": null,
      "net_profit_jp": null,
      "net_profit": null,
      "net_margin": null,
      "employees": null,
      "reference": null
    },
    {
      "year": 1991,
      "month": 3,
      "company_name": "ウシオ電機",
      "consolidation": "単体",
      "accounting_standard": "JGAAP",
      "unit": "億円",
      "sales_jp": null,
      "sales": null,
      "operating_profit_jp": null,
      "operating_profit": null,
      "ordinary_profit_jp": null,
      "ordinary_profit": null,
      "net_profit_jp": null,
      "net_profit": null,
      "net_margin": null,
      "employees": null,
      "reference": null
    },
    {
      "year": 1992,
      "month": 3,
      "company_name": "ウシオ電機",
      "consolidation": "単体",
      "accounting_standard": "JGAAP",
      "unit": "億円",
      "sales_jp": null,
      "sales": null,
      "operating_profit_jp": null,
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      "company_name": "ウシオ電機",
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      "accounting_standard": "JGAAP",
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      "company_name": "ウシオ電機",
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      "company_name": "ウシオ電機",
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      "company_name": "ウシオ電機",
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      "accounting_standard": "JGAAP",
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    },
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      "company_name": "ウシオ電機",
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      "accounting_standard": "JGAAP",
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      "company_name": "ウシオ電機",
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      "accounting_standard": "JGAAP",
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    },
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      "company_name": "ウシオ電機",
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    },
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      "company_name": "ウシオ電機",
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      "operating_profit_jp": null,
      "operating_profit": null,
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      "company_name": "ウシオ電機",
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      "company_name": "ウシオ電機",
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      "company_name": "ウシオ電機",
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      "company_name": "ウシオ電機",
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      "company_name": "ウシオ電機",
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      "company_name": "ウシオ電機",
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      "company_name": "ウシオ電機",
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      "company_name": "ウシオ電機",
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      "company_name": "ウシオ電機",
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      "net_profit_jp": "親会社株主に帰属する当期純利益",
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      "reference": null
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      "company_name": "ウシオ電機",
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      "accounting_standard": "JGAAP",
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      "net_profit_jp": "親会社株主に帰属する当期純利益",
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      "company_name": "ウシオ電機",
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      "accounting_standard": "JGAAP",
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      "net_profit_jp": "親会社株主に帰属する当期純利益",
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      "net_margin": 4.05,
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      "reference": null
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      "company_name": "ウシオ電機",
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      "net_profit_jp": "親会社株主に帰属する当期純利益",
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      "company_name": "ウシオ電機",
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      "company_name": "ウシオ電機",
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}