{ "spec_version": "4", "endpoint": "history", "stock_code": "4006", "company_name": "チッソ", "content_lang": "ja", "meta_lang": "en", "canonical_url": "https://the-shashi.com/tse/4006/decisions/", "api_url": "/api/4006/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/4006/decisions/", "source": { "long_term": { "primary": [ "ダイヤモンド会社産業総覧 1964年版 半期合算" ], "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": "チッソの歴史概略", "eras": [ { "title": "野口遵の曾木電気から日本窒素肥料の水俣工場とカザレー式アンモニアまで", "start_year": 1906, "end_year": 1926 }, { "title": "朝鮮窒素肥料の興南工場と水豊ダム、敗戦による在外資産の喪失", "start_year": 1927, "end_year": 1949 }, { "title": "新日本窒素肥料としての再出発と水俣病の公式確認、石油化学への参入", "start_year": 1950, "end_year": 1967 }, { "title": "アセトアルデヒド製造停止と水俣病裁判、上場廃止に至るチッソ", "start_year": 1968, "end_year": 1978 } ], "overview": [ { "label": "創業", "text": "1906年1月、野口遵氏が鹿児島県伊佐郡大口村に資本金20万円で曾木電気を設立した。当時の水力発電所は貯水池を持たない自流式で発電量を調節できず、送り先のない電力が全国で余っていた。市町村へ配電しながら、余った電力でカーバイドをつくることを設立の目的に掲げる。1907年に日本カーバイド商会を設立して熊本県水俣へ工場を建設し、1908年8月に両社を合併して日本窒素肥料を設立した。同年、財閥系に先んじてドイツのフランク・カロー式石灰窒素製造法の導入契約と特許権を取得し、水俣で石灰窒素と硫安の製造を開始する。1921年にはカザレー式アンモニア合成法の特許を買い取り、1923年9月に宮崎県延岡へ硫安工場を建設した。" }, { "label": "決断", "text": "補償を払い続けるために、事業のほうを手放した。1973年3月20日の熊本地裁判決はチッソの責任を確定し、1959年12月の見舞金契約を公序良俗違反とする。同年7月の患者補償協定の後、支払いは資産の処分で賄われ、1973年9月に堺工場を24億円、1974年2月にチッソ電子化学を三菱金属へ34億円で譲渡した。1975年3月期末の累積欠損は155億3,000万円と資本金78億1,400万円のほぼ倍に達する。支払った補償金は漁業補償を含め210億円弱、処分した資産は122億円で、差額は自力では埋まらなかった。" }, { "label": "現況", "text": "製造も販売もせず、補償を担う主体としてだけ残っている。2011年1月にJNCを設立し、同年3月に事業を譲渡した。以後のチッソが開示する連結業績はJNCを中心とする企業集団のもので、2026年3月期の連結売上高は1,370億円、経常利益35億円である。連結従業員は2,493名にのぼるのに対し、チッソ単体は29名にとどまる。セグメントではアグリ・ライフイノベーションが売上608億円、ケミカルマテリアルが368億円と大きく、営業利益では発電を担うグリーンエネルギーの21億円が最大となった。創業時に余った電力から始めた発電が、事業譲渡を経てなお最も利益を出している。連結売上高は2014年3月期の2,288億円を超えられないまま推移している。" }, { "label": "競合", "text": "日窒が二つに割れたとき、水俣を引き継いだのはチッソだけだった。1945年の敗戦でチッソは朝鮮・興南の設備を含む在外資産の一切を失い、財閥解体では宮崎県延岡の工場群が切り離される。この延岡が[日窒コンツェルンから分離独立](/tse/3407/decisions/nicchitsu-dokuritsu-1946/)して旭化成工業となり、内地に残ったのは空襲で壊滅した水俣工場だけだった。延岡を引き継いだ側は[ヘーベルハウスで住宅事業へ参入し](/tse/3407/decisions/miyazaki-house-hebel-1972/)して住宅と医療へ広げ、新潟水俣病の補償を負った昭和電工も引当金を計上しながら上場を保ち、[日立化成を買収して半導体材料へ移った](/tse/4004/decisions/showa-denko-hitachi-chemical-2020/)している。水俣を引き継いだ側だけが1978年に上場を失い、熊本県が県債で調達した資金を借りて補償を続ける立場に置かれた。どの工場が手元に残ったかが、3社が次に何へ投資できるかを分けた。" } ], "profile": [ { "key": "founding_business", "label": "祖業", "value": "余った水力電気で作るカーバイドと石灰窒素" }, { "key": "delisting", "label": "上場と廃止", "value": "〜1978年", "note": "債務超過と無配で廃止、現在はJNCを傘下に置く補償の主体" } ], "summary": { "description": "チッソの歴史を創業から現在まで一次資料でたどる。沿革・財務・歴代社長・大株主・セグメントの長期データを時系列で横断。" }, "long_term": [ { "year": 1906, "month": 3, "company_name": "チッソ", "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": 1907, "month": 3, "company_name": "チッソ", "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": 1908, "month": 3, "company_name": "チッソ", "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": 1909, "month": 3, "company_name": "チッソ", "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": 1910, "month": 3, "company_name": "チッソ", "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": 1911, "month": 3, "company_name": "チッソ", "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": 1912, "month": 3, "company_name": "チッソ", "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": 1913, "month": 3, "company_name": "チッソ", "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": 1914, "month": 3, "company_name": "チッソ", "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": 1915, "month": 3, "company_name": "チッソ", "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": 1916, "month": 3, "company_name": "チッソ", "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": 1917, "month": 3, "company_name": "チッソ", "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": 1918, "month": 3, "company_name": "チッソ", "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": 1919, "month": 3, "company_name": "チッソ", "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": 1920, "month": 3, "company_name": "チッソ", "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": 1921, "month": 3, "company_name": "チッソ", "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": 1922, "month": 3, "company_name": "チッソ", "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": 1923, "month": 3, "company_name": "チッソ", "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": 1924, "month": 3, "company_name": "チッソ", "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": 1925, "month": 3, "company_name": "チッソ", "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": 1926, "month": 3, "company_name": "チッソ", "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": 1927, "month": 3, "company_name": "チッソ", "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": 1928, "month": 3, "company_name": "チッソ", "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": 1929, "month": 3, "company_name": "チッソ", "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": 1930, "month": 3, "company_name": "チッソ", "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": 1931, "month": 3, "company_name": "チッソ", "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": 1932, "month": 3, "company_name": "チッソ", "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": 1933, "month": 3, "company_name": "チッソ", "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": 1934, "month": 3, "company_name": "チッソ", "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": 1935, "month": 3, "company_name": "チッソ", "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": 1936, "month": 3, "company_name": "チッソ", "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": 1937, "month": 3, "company_name": "チッソ", "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": 1938, "month": 3, "company_name": "チッソ", "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": 1939, "month": 3, "company_name": "チッソ", "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": 1940, "month": 3, "company_name": "チッソ", "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": 1941, "month": 3, "company_name": "チッソ", "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": 1942, "month": 3, "company_name": "チッソ", "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": 1943, "month": 3, "company_name": "チッソ", "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": 1944, "month": 3, "company_name": "チッソ", "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": 1945, "month": 3, "company_name": "チッソ", "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": 1946, "month": 3, "company_name": "チッソ", "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": 1947, "month": 3, "company_name": "チッソ", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": null, "sales": null, "operating_profit_jp": null, 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