{ "spec_version": "5", "endpoint": "history", "stock_code": "9505", "company_name": "北陸電力", "content_lang": "ja", "meta_lang": "en", "canonical_url": "https://the-shashi.com/tse/9505/decisions/", "api_url": "/api/9505/history.json", "updated": "2026-10-13", "license": "© 2026 Yutaka Sugiura. All rights reserved.", "attribution": "The社史 (the-shashi.com) — https://the-shashi.com/tse/9505/decisions/", "source": { "chapters": { "html_url": "https://the-shashi.com/tse/9505/", "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", "ダイヤモンド会社産業総覧 1964年版 半期合算" ], "extraction": "EDINET の XBRL、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": "北陸電力の歴史概略", "eras": [ { "title": "電気事業再編成による設立と1959年の発電所群の完工", "start_year": 1951, "end_year": 1972, "phase": "founding" }, { "title": "福井・富山新港の火力発電所と志賀原子力発電所の着工", "start_year": 1973, "end_year": 1992, "phase": "growth" }, { "title": "志賀原発1号機の営業運転と臨界事故の隠蔽", "start_year": 1993, "end_year": 2010, "phase": "scandal" }, { "title": "志賀原発の全2基停止と能登半島地震の被災", "start_year": 2011, "end_year": 2026 } ], "overview": [ { "label": "決断", "text": "水力で足りない電源を、料金の改訂と他社との協定で補ってきた会社である。1954年に神通川第一・第二発電所の合計12万kWを完工し、1959年には常願寺川・有峰の計画による一連の発電所で26万7,000kW余を加えた。その間の1957年7月には、9電力会社に先がけて東北電力とともに料金の値上げ認可を得ている。水力の有利な地点が減ると、1960年3月から関西電力との協定で大阪火力4号機の電力を受け、1964年8月には自社の富山火力1号機の運転を始めた。1966年8月には電気供給規程を改定し、1968年時点で水主火従から火主水従への移行を方針に掲げた。" }, { "label": "現況", "text": "現在の収益の大半は、発電と小売を担う発電・販売事業から生まれる。2026年3月期の連結売上高は7,866億円、営業利益は875億円で、営業利益率は11.1%だった。売上高の91.8%を発電・販売事業が占め、送配電事業は8.2%にとどまる。一方で利益の振れは大きく、燃料費を料金へ反映させるまでの時間差から、2022年3月期と2023年3月期は営業赤字を計上した。1993年に営業運転を始めた志賀原子力発電所が2011年以降2基とも止まっているため、火力の燃料費が原価を左右しやすい。" } ], "profile": [ { "key": "founding_business", "label": "祖業", "value": "北陸3県と岐阜県の一部への発送配電" }, { "key": "current_issue", "label": "現在の注力課題", "value": "志賀原子力発電所2号機の再稼働と能登の設備復旧", "tags": [ "インフラ投資", "脱炭素" ] } ], "lineage": { "path": "9505-lineage-top.v3.json" }, "timelineLead": "1951年に電気事業再編成令により設立された北陸の電力会社が起源。\n1959年に常願寺川・有峰の計画による一連の発電所を完工させて水力開発を進め、1993年には志賀原子力発電所1号機の営業運転を始めた。北陸を供給区域とする電力会社として発電から小売までを担い、売上高は7,866億円にのぼる。", "lineageLead": "電気事業再編成令にもとづき、北陸配電と日本発送電の設備を継いで1951年に発足した電力会社。\n1952年に東証一部へ上場し、1993年に志賀原子力発電所1号機の営業運転を始めた。2020年には一般送配電事業を北陸電力送配電に承継し、発電・小売と送配電を別の法人に分ける体制へ移っている。", "foundingStory": true, "chapters": [ { "start_year": 1951, "end_year": 1972, "main_title": "電気事業再編成による設立と1959年の発電所群の完工", "subsections": [ { "title": "北陸配電と日本発送電から継いだ34万kWと、神通川第一・第二の12万kW", "text": "北陸電力は1951年5月1日、電気事業再編成令にもとづき資本金3億7,000万円で発足した。発起人は北陸配電と日本発送電の2社で、北陸配電の全設備と日本発送電の設備の一部を引き継いだ。前身の北陸配電は1942年4月の配電統制令で北陸合同電気を吸収し、日本電力・京都電燈などの現物出資で統合された会社である。統合の対象は北陸配電の資本金2億800万円と、日本発送電の資本金30億円のうち9,000万円だった。旧日本発送電の株主には、1対0.003の割合で額面500円の新株が割り当てられた。供給区域は富山・石川・福井の3県と岐阜県の一部で、契約口数は54万口だった。初代社長には北陸配電の社長を務めた山田昌作氏が就任し、独立採算のもとで発送配電を一貫して運営することを使命に掲げた。\n\n発足時に帰属した電源は水力発電所96か所の33万6,000kW余と火力発電所1か所の1万kWで、合計34万6,000kW余にとどまった。区域内の工場の多くは安く豊富な電力を求めて進出しており、電力を原料のように使う電解・電炉工業が中心を占めた。電力不足が産業界に与える打撃は、他の地方を上回る大きさだった。発足当初は電源の帰属が不十分で、北陸の需要をまかなう供給力が著しく足りなかった。経営陣は電源の開発とサービスの向上を二大目標に掲げ、戦時中の酷使で荒れた設備の整備にも着手した。1956年度の需要構成をみると大口電力が80.2%を占め、家庭向けの電灯は6.9%にとどまる。\n\n電源の早期開発をめざし、第1次計画で五条方・伊折・神通川第一・神通川第二の4地点、合計15万5,500kWを開発。神通川第一・第二の両発電所は1954年に完工し、合計出力は12万kWに達した。1953年11月には黒部水力を合併し、6発電所の2万8,230kWを取り込んだ。1955年1月末の供給力は60万kWを超え、北陸の需給はほぼ均衡した。北陸電力は電力の割当制を他の地方より早く廃止し、渇水期でも他の地方へ電力を融通できる水準になった。送電では富山・伏木の工業地帯と新しい大容量電源を結ぶ線に初めて15万V系を採用し、東京電力・中部電力の系統とも連絡した。開発資金は210億円にのぼり、3回の増資を経て資本金は1954年12月に35億円へ増えた。", "references": [ { "title": "会社銀行八十年史（1955）「北陸電力」", "year": null, "month": null, "date": null, "url": null, "quotes": [] }, { "title": "株式会社年鑑 1952年版「北陸電力」", "year": null, "month": null, "date": null, "url": null, "quotes": [] }, { "title": "日本企業要覧 1960年版「北陸電力」", "year": null, "month": null, "date": null, "url": null, "quotes": [] }, { "title": "ダイヤモンド会社産業総覧 1964年版「北陸電力」", "year": null, "month": null, "date": null, "url": null, "quotes": [] }, { "title": "企業の歴史 : 明治百年（1968）「北陸電力」", "year": null, "month": null, "date": null, "url": null, "quotes": [] }, { "title": "経済情報 8(10) 1957年「料金改訂後の北陸電力」", "year": null, "month": null, "date": null, "url": null, "quotes": [] }, { "title": "日本企業要覧 1966年版「北陸電力」", "year": null, "month": null, "date": null, "url": null, "quotes": [] }, { "title": "日本企業要覧 1968年版「北陸電力」", "year": null, "month": null, "date": null, "url": null, "quotes": [] } ], "start_year": 1951 }, { "title": "常願寺川の有峰ダムと、料金改訂で整えた開発の元手", "text": "流れ込み式の水力が中心の北陸電力にとって、川の水量の増減は経営に直接ひびいた。1954年下期は異常な渇水に見舞われ、同年11月の管内河川の出水率は62.6%と1942年以来の最低を記録した。打ち出したのは、常願寺川上流の有峰に大貯水池を築き、下流に発電所を連ねる有峰計画である。工事中の和田川第一2万7,000kW、和田川第二12万2,000kWなどに常願寺第一の増加分を合わせると、合計最大出力は26万5,400kWとなる。いずれも1960年までの完成を予定し、会社の命運を左右する計画と位置づけた。貯水池で季節ごとの水量の差をならし、渇水の年でも出力を保つ狙いがあったとみられる。\n\n北陸電力は1957年7月14日、東北電力とともに9電力会社に先がけて電気料金の値上げを認められた。申請した値上げ率は電灯112%、電力119.9%、合計118.14%だった。当局は電力料金の頭打ち規定を援用し、1957年度は合計114.82%の暫定料金にとどめ、申請どおりの率を1958年度から認めた。値上げを迫った要因は、水力開発による電力原価の上昇と渇水準備金の積み立ての少なさにある。1955年時点の料金は1kWhあたり2円82銭8厘で、全国平均5円16銭の54%にすぎなかった。低く据え置かれた料金を改め、適正な償却で事業の自主性を確立することは、発足時からの経営目標の一つだった。開発資金の調達先では、1959年3月時点の長期借入金のうち日本開発銀行の24,645,265千円が最大を占めた。\n\n常願寺川・有峰の計画による一連の発電所は1959年に完工し、合計出力は26万7,000kW余に達した。発足時に帰属した電源34万6,000kW余の8割弱を、1つの水系の開発で上乗せした計算になる。同じ1959年、山田昌作氏が社長を退任し、副社長の金井久兵衛氏が社長に就任した。金井久兵衛氏は京都帝大で電気工学を学び、北陸配電の社長を経て北陸電力の社長室長と副社長を務めた。山田昌作氏は1960年5月の総会で取締役から相談役に移った。1959年9月期の営業収入は9,068,171千円、純利益は718,017千円だった。1968年までに建設した水力発電所は38か所、合計75万7,000kW余に及んだ。一連の発電所の完工で、北陸電力の水力開発は一つの到達点を迎えたと推察される。", "references": [ { "title": "会社銀行八十年史（1955）「北陸電力」", "year": null, "month": null, "date": null, "url": null, "quotes": [] }, { "title": "株式会社年鑑 1952年版「北陸電力」", "year": null, "month": null, "date": null, "url": null, "quotes": [] }, { "title": "日本企業要覧 1960年版「北陸電力」", "year": null, "month": null, "date": null, "url": null, "quotes": [] }, { "title": "ダイヤモンド会社産業総覧 1964年版「北陸電力」", "year": null, "month": null, "date": null, "url": null, "quotes": [] }, { "title": "企業の歴史 : 明治百年（1968）「北陸電力」", "year": null, "month": null, "date": null, "url": null, "quotes": [] }, { "title": "経済情報 8(10) 1957年「料金改訂後の北陸電力」", "year": null, "month": null, "date": null, "url": null, "quotes": [] }, { "title": "日本企業要覧 1966年版「北陸電力」", "year": null, "month": null, "date": null, "url": null, "quotes": [] }, { "title": "日本企業要覧 1968年版「北陸電力」", "year": null, "month": null, "date": null, "url": null, "quotes": [] } ], "start_year": 1955, "opinionPos": [ [ 291 ], [], [ 337 ] ] }, { "title": "関西電力と協定した大阪火力4号機と、富山火力の運転開始", "text": "経済的に有利な水力の開発地点は次第に少なくなり、火力の開発が必要になった。ただし当時の北陸は重油ボイラー規制法で重油の消費を規制される地域にあたり、地元に重油火力を建てる条件が整っていなかった。北陸電力は関西電力と協定を結び、大阪火力4号機15万6,000kWの電力を北陸にある関西電力の水力の発電分と振り替え、1960年3月から受電した。電力の広域運営の初期の例である。中部電力とも、四日市火力3号機32万kWの半量を1964年9月から受電する契約を結んだ。条件が整うと重油専焼の富山火力に着手し、1号機15万6,000kWを1964年8月、2号機を1966年2月に完成させた。第1期の総工事資金は83億8,000万円だった。\n\n火力の比重が高まる一方、需要は1958年度42億kWh、1963年度70億kWh、1967年度95億kWhと増え、創立当初年度の約4.8倍になった。料金は1962年度の総合単価が4円21銭で、全国最低の水準にあった。北陸電力は1966年8月に電気供給規程を改定し、料金を引き上げた。同時に需要開拓と全社の合理化を進め、経営基盤の長期安定をめざした。1968年時点で掲げた方針は、水主火従から火主水従の開発形態への移行。富山火力3号機25万kWを1970年1月の完成目標で建設し、4号機25万kWも予定した。さらに石川県能登に原子力発電所の建設地点を選び、1973年着工・1975年運転開始の計画を立てた。料金の改定で原価の裏付けを得たことが、大型火力と原子力の計画を進める条件になったのだろう。", "references": [ { "title": "会社銀行八十年史（1955）「北陸電力」", "year": null, "month": null, "date": null, "url": null, "quotes": [] }, { "title": "株式会社年鑑 1952年版「北陸電力」", "year": null, "month": null, "date": null, "url": null, "quotes": [] }, { "title": "日本企業要覧 1960年版「北陸電力」", "year": null, "month": null, "date": null, "url": null, "quotes": [] }, { "title": "ダイヤモンド会社産業総覧 1964年版「北陸電力」", "year": null, "month": null, "date": null, "url": null, "quotes": [] }, { "title": "企業の歴史 : 明治百年（1968）「北陸電力」", "year": null, "month": null, "date": null, "url": null, "quotes": [] }, { "title": "経済情報 8(10) 1957年「料金改訂後の北陸電力」", "year": null, "month": null, "date": null, "url": null, "quotes": [] }, { "title": "日本企業要覧 1966年版「北陸電力」", "year": null, "month": null, "date": null, "url": null, "quotes": [] }, { "title": "日本企業要覧 1968年版「北陸電力」", "year": null, "month": null, "date": null, "url": null, "quotes": [] } ], "start_year": 1961, "opinionPos": [ [], [ 346 ] ] } ] } ], "long_term": [ { "year": 1952, "month": 3, "company_name": "北陸電力", "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": "北陸電力", "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": "北陸電力", "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": "北陸電力", "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": "北陸電力", "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": 1957, "month": 3, "company_name": "北陸電力", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "営業収益", "sales": 121, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": "経常利益", "ordinary_profit": 11, "net_profit_jp": null, "net_profit": null, "net_margin": null, "employees": null, "reference": "ダイヤモンド会社産業総覧 1964年版 半期合算" }, { "year": 1958, "month": 3, "company_name": "北陸電力", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "営業収益", "sales": 149, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": "経常利益", "ordinary_profit": 14, "net_profit_jp": null, "net_profit": null, "net_margin": null, "employees": null, "reference": "ダイヤモンド会社産業総覧 1964年版 半期合算" }, { "year": 1959, "month": 3, "company_name": "北陸電力", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "営業収益", "sales": 157, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": "経常利益", "ordinary_profit": 23, "net_profit_jp": null, "net_profit": null, "net_margin": null, "employees": null, "reference": "ダイヤモンド会社産業総覧 1964年版 半期合算" }, { "year": 1960, "month": 3, "company_name": "北陸電力", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "営業収益", "sales": 178, "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": 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