{ "spec_version": "4", "endpoint": "history", "stock_code": "1860", "company_name": "戸田建設", "content_lang": "ja", "meta_lang": "en", "canonical_url": "https://the-shashi.com/tse/1860/decisions/", "api_url": "/api/1860/history.json", "updated": "2026-09-26", "license": "© 2026 Yutaka Sugiura. All rights reserved.", "attribution": "The社史 (the-shashi.com) — https://the-shashi.com/tse/1860/decisions/", "source": { "long_term": { "primary": [ "会社年鑑（1986年版）", "会社年鑑（1976年版）", "会社年鑑（1963年版）", "会社年鑑（1971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" } }, "title": "戸田建設の歴史概略", "eras": [ { "title": "初代戸田利兵衛が赤坂で始めた請負業が戸田組となり、日英博覧会工事を得る", "start_year": 1881, "end_year": 1919 }, { "title": "2代利兵衛の襲名と新本社、株式会社戸田組への改組と戦時", "start_year": 1920, "end_year": 1945 }, { "title": "終戦後の組織再編と全国支店、戸田建設への改称と東証上場", "start_year": 1946, "end_year": 1971 }, { "title": "ブラジル・米国への進出と創業100周年、島藤建設との合併とバブル後", "start_year": 1972, "end_year": 2002 }, { "title": "創業家以外の社長の誕生と、工事採算悪化による巨額赤字からの立て直し", "start_year": 2003, "end_year": 2026 } ], "summary": { "description": "戸田建設（旧戸田組）の歴史。1881年、初代戸田利兵衛氏が東京・赤坂で土木建築請負業を創業。ロンドン日英博覧会の工事受注、島藤建設工業との合併、創業家以外から初の社長就任と工事採算悪化までの沿革と経緯を執筆。" }, "long_term": [ { "year": 1950, "month": 3, "company_name": "戸田建設", "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": 1951, "month": 3, "company_name": "戸田建設", "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": 1952, "month": 3, "company_name": "戸田建設", "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": 1953, "month": 3, "company_name": "戸田建設", "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": 1954, "month": 3, "company_name": "戸田建設", "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": 1955, "month": 3, "company_name": "戸田建設", "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": 1956, "month": 3, "company_name": "戸田組", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 71, "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": "会社年鑑（1963年版）" }, { "year": 1957, "month": 3, "company_name": "戸田組", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 90, "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": "会社年鑑（1963年版）" }, { "year": 1958, "month": 3, "company_name": "戸田組", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 114, "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": "会社年鑑（1963年版）" }, { "year": 1959, "month": 3, "company_name": "戸田組", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 126, "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": "会社年鑑（1963年版）" }, { "year": 1960, "month": 3, "company_name": "戸田組", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 155, "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": "会社年鑑（1963年版）" }, { "year": 1961, "month": 3, "company_name": "戸田組", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 196, "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": "会社年鑑（1963年版）" }, { "year": 1962, "month": 3, "company_name": "戸田組", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 231, "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": "会社年鑑（1963年版）" }, { "year": 1963, "month": 3, "company_name": "戸田建設", "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": 1964, "month": 3, "company_name": "戸田建設", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 285, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": null, "ordinary_profit": null, "net_profit_jp": "当期純利益", "net_profit": 23, "net_margin": 8.07, "employees": null, "reference": "会社年鑑（1971年版）" }, { "year": 1965, "month": 3, "company_name": "戸田建設", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 375, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": null, "ordinary_profit": null, "net_profit_jp": "当期純利益", "net_profit": 13, "net_margin": 3.466, "employees": null, "reference": "会社年鑑（1971年版）" }, { "year": 1966, "month": 3, "company_name": "戸田建設", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 420, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": "経常利益", "ordinary_profit": 19, "net_profit_jp": "当期純利益", "net_profit": 11, "net_margin": 2.619, "employees": null, "reference": "会社年鑑（1976年版）" }, { "year": 1967, "month": 3, "company_name": "戸田建設", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 427, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": "経常利益", "ordinary_profit": 14, "net_profit_jp": "当期純利益", "net_profit": 8, "net_margin": 1.873, "employees": null, "reference": "会社年鑑（1976年版）" }, { "year": 1968, "month": 9, "company_name": "戸田建設", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 605, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": "経常利益", "ordinary_profit": 20, "net_profit_jp": "当期純利益", "net_profit": 11, "net_margin": 1.818, "employees": null, "reference": "会社年鑑（1976年版）" }, { "year": 1969, "month": 9, "company_name": "戸田建設", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 749, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": "経常利益", "ordinary_profit": 40, "net_profit_jp": "当期純利益", "net_profit": 20, "net_margin": 2.67, "employees": null, "reference": "会社年鑑（1976年版）" }, { "year": 1970, "month": 9, "company_name": "戸田建設", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 954, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": "経常利益", "ordinary_profit": 66, "net_profit_jp": "当期純利益", "net_profit": 31, "net_margin": 3.249, "employees": null, "reference": "会社年鑑（1976年版）" }, { "year": 1971, "month": 9, "company_name": "戸田建設", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 1089, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": "経常利益", "ordinary_profit": 61, "net_profit_jp": "当期純利益", "net_profit": 33, "net_margin": 3.03, "employees": null, "reference": "会社年鑑（1976年版）" }, { "year": 1972, "month": 9, "company_name": "戸田建設", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 1236, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": "経常利益", "ordinary_profit": 72, "net_profit_jp": "当期純利益", "net_profit": 38, "net_margin": 3.074, "employees": null, "reference": "会社年鑑（1976年版）" }, { "year": 1973, "month": 9, "company_name": "戸田建設", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 1847, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": "経常利益", "ordinary_profit": 72, "net_profit_jp": "当期純利益", "net_profit": 39, "net_margin": 2.111, "employees": null, "reference": "会社年鑑（1976年版）" }, { "year": 1974, "month": 9, "company_name": "戸田建設", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 2046, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": "経常利益", "ordinary_profit": 74, "net_profit_jp": "当期純利益", "net_profit": 26, "net_margin": 1.27, "employees": null, "reference": "会社年鑑（1976年版）" }, { "year": 1975, "month": 9, "company_name": "戸田建設", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 2093, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": "経常利益", "ordinary_profit": 114, "net_profit_jp": "当期純利益", "net_profit": 41, "net_margin": 1.958, "employees": null, "reference": "会社年鑑（1986年版）" }, { "year": 1976, "month": 9, "company_name": "戸田建設", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 2196, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": "経常利益", "ordinary_profit": 103, "net_profit_jp": "当期純利益", "net_profit": 41, "net_margin": 1.867, "employees": null, "reference": "会社年鑑（1986年版）" }, { "year": 1977, "month": 9, "company_name": "戸田建設", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 2308, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": "経常利益", "ordinary_profit": 83, "net_profit_jp": "当期純利益", "net_profit": 31, "net_margin": 1.343, "employees": null, "reference": "会社年鑑（1986年版）" }, { "year": 1978, "month": 9, "company_name": "戸田建設", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 2315, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": "経常利益", "ordinary_profit": 70, "net_profit_jp": "当期純利益", "net_profit": 27, "net_margin": 1.166, "employees": null, "reference": "会社年鑑（1986年版）" }, { "year": 1979, "month": 9, "company_name": "戸田建設", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 2701, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": "経常利益", "ordinary_profit": 83, "net_profit_jp": "当期純利益", "net_profit": 31, "net_margin": 1.147, "employees": null, "reference": "会社年鑑（1986年版）" }, { "year": 1980, "month": 9, "company_name": "戸田建設", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 2863, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": "経常利益", "ordinary_profit": 95, "net_profit_jp": "当期純利益", "net_profit": 34, "net_margin": 1.187, "employees": null, "reference": "会社年鑑（1986年版）" }, { "year": 1981, "month": 9, "company_name": "戸田建設", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 3250, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": "経常利益", "ordinary_profit": 124, "net_profit_jp": "当期純利益", "net_profit": 42, "net_margin": 1.292, "employees": null, "reference": "会社年鑑（1986年版）" }, { "year": 1982, "month": 9, "company_name": "戸田建設", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 3392, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": "経常利益", "ordinary_profit": 146, "net_profit_jp": "当期純利益", "net_profit": 52, "net_margin": 1.533, "employees": null, "reference": "会社年鑑（1986年版）" }, { "year": 1983, "month": 9, "company_name": "戸田建設", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 3592, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": "経常利益", "ordinary_profit": 121, "net_profit_jp": "当期純利益", "net_profit": 42, "net_margin": 1.169, "employees": null, "reference": "会社年鑑（1986年版）" }, { "year": 1984, "month": 9, "company_name": "戸田建設", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 3439, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": "経常利益", "ordinary_profit": 85, "net_profit_jp": "当期純利益", "net_profit": 30, "net_margin": 0.872, "employees": null, "reference": "会社年鑑（1986年版）" }, { "year": 1985, "month": 3, "company_name": "戸田建設", "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": "戸田建設", "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": "戸田建設", "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": "戸田建設", "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": "戸田建設", "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": "戸田建設", "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": "戸田建設", "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": "戸田建設", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": null, "sales": null, "operating_profit_jp": null, 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