{ "spec_version": "4", "endpoint": "history", "stock_code": "9735", "company_name": "セコム", "content_lang": "ja", "meta_lang": "en", "canonical_url": "https://the-shashi.com/tse/9735/decisions/", "api_url": "/api/9735/history.json", "updated": "2026-10-03", "license": "© 2026 Yutaka Sugiura. All rights reserved.", "attribution": "The社史 (the-shashi.com) — https://the-shashi.com/tse/9735/decisions/", "source": { "chapters": { "html_url": "https://the-shashi.com/tse/9735/", "primary": [ "社史", "有価証券報告書", "新聞・雑誌記事" ], "extraction": "一次資料を読み合わせて執筆" }, "long_term": { "primary": [ "有価証券報告書", "会社年鑑", "会社年鑑（1976年版）" ], "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" }, "decisions": { "html_url": "https://the-shashi.com/tse/9735/decisions/", "primary": [ "企業の公表資料", "新聞・雑誌記事" ], "extraction": "本文は API に載せない。行ごとの html_url のページを参照すること" } }, "title": "セコムの歴史概略", "eras": [ { "title": "日本警備保障の設立とSPアラームによる機械警備への転換", "start_year": 1962, "end_year": 1977, "phase": "founding" }, { "title": "家庭用マイアラームの発売とセコムへの商号変更", "start_year": 1978, "end_year": 1990, "phase": "stable_growth" }, { "title": "5分野への組織改革と在宅医療・損害保険への進出", "start_year": 1991, "end_year": 2005, "phase": "stable_growth" }, { "title": "能美防災とアット東京の子会社化", "start_year": 2006, "end_year": 2015, "phase": "stable_growth" }, { "title": "AI警備システムの発売とセノンの買収", "start_year": 2016, "end_year": 2026, "phase": "stable_growth" } ], "overview": [ { "label": "創業", "text": "1962年7月7日、飯田亮氏と戸田壽一氏が[東京で日本警備保障を設立した](/tse/9735/decisions/founding-1962/)。資本金600万円、社員5名の陣容で、酒問屋の家に生まれた飯田氏は29歳だった。当時の日本では治安の維持を警察が無償で担う通念が根強く、警備を有償の商品として売る会社は存在しない。1964年10月の東京オリンピックでは選手村などの警備を単独で受注し、創業から2年で国家的行事を担っている。もっとも請け負える民間会社がほかにほとんど無かった事情もあり、翌1965年末に法人からの注文が殺到すると、人を採るだけでは応じきれない限界のほうが先に現れた。" }, { "label": "決断", "text": "警備員の人数で決まっていた売上を、契約の件数で決まる形へ変えた。1966年6月、[日本初のオンライン安全システム「SPアラーム」を発売した](/tse/9735/decisions/online-security-1966/)。センサーが異常を検知して専用回線で監視センターへ通報し、駆けつけ要員が現場へ向かう仕組みで、契約が積み上がるほど1件あたりの費用は薄まる。1983年12月には日本警備保障からセコムへ商号を変更し、警備業の外へ売り先を広げる名分を得ている。1991年12月に[事業を5分野へ分割して専任役員へ権限を委ね](/tse/9735/decisions/executive-structure-reform-1992/)、1994年には[在宅医療と訪問看護へ参入した](/tse/9735/decisions/medical-home-care-entry-1994/)。継続課金で貯めた現金が、規制が厚くて他業種の入りにくい産業へ入る費用を賄った。" }, { "label": "現況", "text": "買収で加えた5事業の利益を合わせても、機械警備1つに達しない。2026年3月期の連結売上高は1兆2,569億円、営業利益は1,603億円である。セキュリティサービスが売上6,606億円・利益1,238億円を計上し、6事業のセグメント利益1,752億円の7割をこの1事業が占めた。残る5事業は防災の1,869億円・247億円を筆頭に、BPO・ICT、メディカル、保険、地理空間情報が並ぶ。2010年代に現金管理やBPOを取得して売上高は1兆円を超えたが、取り込んだ領域は人手への依存が高く、利益は動かなかった。2024年4月に就任した吉田保幸社長が2025年5月に上限600億円の自己株式取得を決議したのは、事業を足しても1株あたりの利益を増やせなかったからである。" }, { "label": "競合", "text": "競争の焦点は同業2社の間ではなく、警備員を採れるかどうかにある。1980年代後半の日本には警備会社が約4,000社あったが、売上高100億円を超えるのは日本警備保障と[綜合警備保障](/tse/2331/)の2社だけであった。1981年に発売した家庭用の\"マイアラーム\"は市場が細く長らく赤字が続いたものの、他社が本格参入するまで約20年間ほぼ単独で営業を続け、2000年代の初めには家庭向けで8割のシェアを得ている。以後の買収は、小荷物用昇降機や集配金のように機械へ置き換えにくい人手の領域へ向かった。機械で置き換えにくい領域を買い集めたことで、賃上げに耐えられるかどうかが競争優位を決めるようになった。" } ], "profile": [ { "key": "founding_business", "label": "祖業", "value": "人手による常駐・巡回警備" }, { "key": "current_issue", "label": "現在の注力課題", "value": "人手領域の買収と自己株取得による還元", "tags": [ "M&A", "株主還元" ] } ], "lineage": { "path": "9735-lineage-top.v2.json" }, "timelineLead": "1962年に飯田亮氏と戸田壽一氏が東京で設立した日本警備保障が起源。\n1964年の東京オリンピックで選手村の警備を担い、1966年に日本初のオンライン安全システム「SPアラーム」を発売した。売上高1兆円を超える警備業の最大手で、家庭向けでは2000年代初めに8割のシェアを得た。", "lineageLead": "前身は1962年設立の日本警備保障。\n1983年にセコムへ商号を変更し、2006年に能美防災を子会社化した。2012年にアット東京、2022年にセノンを子会社化。警備から防災・データセンターへ多角化した。", "foundingStory": true, "summary": { "description": "セコム（旧日本警備保障）の歴史。1962年、飯田亮氏が日本初の警備保障会社として創業。東京五輪選手村の警備、オンライン警備「SPアラーム」、家庭用マイアラーム、在宅医療参入までの沿革と経緯を執筆。" }, "chapters": [ { "start_year": 1962, "end_year": 1977, "main_title": "日本警備保障の設立とSPアラームによる機械警備への転換", "subsections": [ { "title": "産業として存在しない市場へ、前金で販売する", "text": "1962年7月7日、飯田亮氏と戸田壽一氏は日本警備保障株式会社を東京に設立した。資本金600万円、社員5名の陣容で、飯田氏は29歳だった。当時の日本では治安の維持を警察が無償で担う通念が根強く、企業が代金を払って安全を買うという発想は浸透していない。飯田氏は赤坂の酒問屋\"岡永\"の三男で、家業では代金の回収が長期にわたる。前金で対価を受け取れる業態を条件に独立先を探し、欧米で既に機能していた民間警備に行き着いた。飯田氏は独立の動機を『わたしが日本警備保障を設立した動機は、何も高邁なものはなく、何が何でも独立したいというガムシャラな独立心からである』と振り返っている。創業初年度は法人顧客の開拓が難航し、売上はごく小さい水準にとどまった。\n\n1964年10月の東京オリンピックで、日本警備保障は選手村などの警備を単独で担い、創業から2年で国家的行事の警備を任された。請け負える民間警備会社がほかにほとんど存在しなかった事情も、単独受注の背景にあった。日本の警備業は同社が1962年に創業したことに始まり、東京オリンピックによって業界は一挙に拡大している。1965年末には法人からの\"警戒\"注文が殺到した。ところが警備員を常駐・巡回させる人手警備は、契約が増えるほど警備員を増やさねばならず、人件費が売上に比例して膨らむ。1966年末の人員は約790人まで増えており、採用が需要の伸びに追いつかなければ成長が頭打ちになる構造を抱えていた。", "references": [ { "title": "セコム 有価証券報告書 第63期（2025年3月期）【沿革】（当時社名 日本警備保障）", "year": null, "month": null, "date": null, "url": null, "quotes": [] }, { "title": "日経ビジネス 1973年8月6日号（日経マグロウヒル社）", "year": null, "month": null, "date": null, "url": null, "quotes": [] }, { "title": "証券アナリストジャーナル 1998年6月号（36巻7号）", "year": null, "month": null, "date": null, "url": null, "quotes": [] }, { "title": "読売新聞（1965年12月23日）", "year": null, "month": null, "date": null, "url": null, "quotes": [] }, { "title": "読売新聞（1969年4月8日）", "year": null, "month": null, "date": null, "url": null, "quotes": [] }, { "title": "読売新聞（1974年10月2日）", "year": null, "month": null, "date": null, "url": null, "quotes": [] }, { "title": "日経ビジネス 1992年2月24日号", "year": null, "month": null, "date": null, "url": null, "quotes": [] } ], "start_year": 1962 } ] } ], "long_term": [ { "year": 1969, "month": 12, "company_name": "日本警備保障", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 32, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": "経常利益", "ordinary_profit": 3, "net_profit_jp": "当期純利益", "net_profit": 2, "net_margin": 6.25, "employees": null, "reference": "会社年鑑（1976年版）" }, { "year": 1970, "month": 12, "company_name": "日本警備保障", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 49, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": "経常利益", "ordinary_profit": 4, "net_profit_jp": "当期純利益", "net_profit": 2, "net_margin": 4.081, "employees": null, "reference": "会社年鑑（1976年版）" }, { "year": 1971, "month": 12, "company_name": "日本警備保障", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 64, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": "経常利益", "ordinary_profit": 4, "net_profit_jp": "当期純利益", "net_profit": 2, "net_margin": 3.125, "employees": null, "reference": "会社年鑑（1976年版）" }, { "year": 1972, "month": 12, "company_name": "日本警備保障", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 82, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": "経常利益", "ordinary_profit": 6, "net_profit_jp": "当期純利益", "net_profit": 3, "net_margin": 3.658, "employees": null, "reference": "会社年鑑（1976年版）" }, { "year": 1973, "month": 12, "company_name": "日本警備保障", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 110, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": "経常利益", "ordinary_profit": 11, "net_profit_jp": "当期純利益", "net_profit": 6, "net_margin": 5.454, "employees": null, "reference": "会社年鑑（1976年版）" }, { "year": 1974, "month": 12, "company_name": "日本警備保障", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 150, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": "経常利益", "ordinary_profit": 16, "net_profit_jp": "当期純利益", "net_profit": 7, "net_margin": 4.666, "employees": null, "reference": "会社年鑑（1976年版）" }, { "year": 1975, "month": 11, "company_name": "日本警備保障", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 185, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": "経常利益", "ordinary_profit": 23, "net_profit_jp": "当期純利益", "net_profit": 10, "net_margin": 5.405, "employees": null, "reference": "会社年鑑" }, { "year": 1976, "month": 11, "company_name": "日本警備保障", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 240, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": "経常利益", "ordinary_profit": 35, "net_profit_jp": "当期純利益", "net_profit": 17, "net_margin": 7.083, "employees": null, "reference": "会社年鑑" }, { "year": 1977, "month": 11, "company_name": "日本警備保障", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 286, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": "経常利益", "ordinary_profit": 42, "net_profit_jp": "当期純利益", "net_profit": 21, "net_margin": 7.342, "employees": null, "reference": "会社年鑑" }, { "year": 1978, "month": 11, "company_name": "日本警備保障", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 342, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": "経常利益", "ordinary_profit": 54, "net_profit_jp": "当期純利益", "net_profit": 25, "net_margin": 7.309, "employees": null, "reference": "会社年鑑" }, { "year": 1979, "month": 11, "company_name": "日本警備保障", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 402, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": "経常利益", "ordinary_profit": 67, "net_profit_jp": "当期純利益", "net_profit": 32, "net_margin": 7.96, "employees": null, "reference": "会社年鑑" }, { "year": 1980, "month": 11, "company_name": "日本警備保障", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 442, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": "経常利益", "ordinary_profit": 76, "net_profit_jp": "当期純利益", "net_profit": 37, "net_margin": 8.371, "employees": null, "reference": "会社年鑑" }, { "year": 1981, "month": 11, "company_name": "日本警備保障", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 506, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": "経常利益", "ordinary_profit": 92, "net_profit_jp": "当期純利益", "net_profit": 43, "net_margin": 8.498, "employees": null, "reference": "会社年鑑" }, { "year": 1982, "month": 11, "company_name": "日本警備保障", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 552, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": "経常利益", "ordinary_profit": 106, "net_profit_jp": "当期純利益", "net_profit": 50, "net_margin": 9.057, "employees": null, "reference": "会社年鑑" }, { "year": 1983, "month": 11, "company_name": "日本警備保障", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 604, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": "経常利益", "ordinary_profit": 115, "net_profit_jp": "当期純利益", "net_profit": 57, "net_margin": 9.437, "employees": null, "reference": "会社年鑑" }, { "year": 1984, "month": 11, "company_name": "セコム", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 656, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": "経常利益", "ordinary_profit": 128, "net_profit_jp": "当期純利益", "net_profit": 60, "net_margin": 9.146, "employees": null, "reference": "会社年鑑" }, { "year": 1985, "month": 3, "company_name": "セコム", "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": 1986, "month": 3, "company_name": "セコム", "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": 1987, "month": 3, "company_name": "セコム", "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": "セコム", "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": 1989, "month": 3, "company_name": "セコム", "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": "セコム", "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": "セコム", "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": "セコム", "consolidation": "連結", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 2158, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": "経常利益", "ordinary_profit": 289, "net_profit_jp": "当期純利益", "net_profit": 118, "net_margin": 5.468, "employees": null, "reference": "会社年鑑" }, { "year": 1993, "month": 3, "company_name": "セコム", "consolidation": "連結", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 2440, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": "経常利益", "ordinary_profit": 312, "net_profit_jp": "当期純利益", "net_profit": 110, "net_margin": 4.508, "employees": null, "reference": "会社年鑑" }, { "year": 1994, "month": 3, "company_name": "セコム", "consolidation": "連結", 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"https://the-shashi.com/tse/9735/decisions/online-security-1966/" }, { "main_title": "事業5分野への対等分割", "sub_title": "会長個人への経営依存を解くための、専任役員制の導入と権限の分散", "year": 1992, "type": "governance", "html_url": "https://the-shashi.com/tse/9735/decisions/executive-structure-reform-1992/" }, { "main_title": "セコム在宅医療システム設立", "sub_title": "在宅医療への参入と、医療機関の経営を分離する議論への一石", "year": 1994, "type": "new_business", "html_url": "https://the-shashi.com/tse/9735/decisions/medical-home-care-entry-1994/" } ] }