{
  "spec_version": "5",
  "endpoint": "history",
  "stock_code": "5830",
  "company_name": "いよぎんホールディングス",
  "content_lang": "ja",
  "meta_lang": "en",
  "canonical_url": "https://the-shashi.com/tse/5830/decisions/",
  "api_url": "/api/5830/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/5830/decisions/",
  "source": {
    "chapters": {
      "html_url": "https://the-shashi.com/tse/5830/",
      "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"
      ],
      "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": "いよぎんホールディングスの歴史概略",
  "eras": [
    {
      "title": "第二十九国立銀行・第五十二国立銀行の開業と今治商業銀行の設立",
      "start_year": 1878,
      "end_year": 1912,
      "phase": "founding"
    },
    {
      "title": "日本銀行の特別融資と豫州銀行・松山五十二銀行の合併",
      "start_year": 1913,
      "end_year": 1940
    },
    {
      "title": "3行合併の伊豫合同銀行設立と伊豫銀行への改称",
      "start_year": 1941,
      "end_year": 1968,
      "phase": "founding"
    },
    {
      "title": "東証一部上場とニューヨーク支店による海外進出",
      "start_year": 1969,
      "end_year": 1991,
      "phase": "growth"
    },
    {
      "title": "東邦相互銀行の救済合併といよぎんホールディングスへの移行",
      "start_year": 1992,
      "end_year": 2026,
      "phase": "transformation"
    }
  ],
  "overview": [
    {
      "label": "決断",
      "text": "県都より先に、献金と金貸しの実績がある港町から銀行を起こした系譜である。川之石は幕末に宇和島藩へ9千両を献金した土地で、1875年には矢野小十郎氏らの潤業会社が製糸業向けの金貸しを営んでいた。一方、松山の第五十二国立銀行は興産会社との共同出資案が崩れ、士族の出資だけで開業した。今治では1892年設立の今治融通が今治銀行へ改称し、1900年に今治商業銀行を合併して、合併後の銀行が今治商業銀行と名乗った。南予・中予・東予の3つの系譜が、明治のうちに出そろった。"
    },
    {
      "label": "現況",
      "text": "収益は、預金を貸出と有価証券へ振り分ける銀行業が大半を占める。2026年3月期の連結経常収益は2,661億円、純利益は742億円で、前期の533億円から伸びた。セグメント別では銀行業が2,420億円、リース業が214億円である。2025年3月期の業務別では貸出業務が950億円、有価証券投資業務が918億円と拮抗した。2022年10月に伊予銀行の単独株式移転で持株会社へ移り、グループ中期経営計画では従来の5つの事業戦略に新事業戦略を加えた。"
    }
  ],
  "profile": [
    {
      "key": "founding_business",
      "label": "祖業",
      "value": "金禄公債を元手にした国立銀行"
    },
    {
      "key": "current_issue",
      "label": "現在の注力課題",
      "value": "新事業戦略を加えた6つの事業戦略とBPR",
      "tags": [
        "新規事業",
        "業務改革"
      ]
    }
  ],
  "lineage": {
    "path": "5830-lineage-top.v3.json"
  },
  "timelineLead": "1878年に旧宇和島藩領の川之石浦で開業した第二十九国立銀行が起源。\n1941年に豫州・松山五十二・今治商業の3行が合併して伊豫合同銀行となり、2022年に持株会社へ移った。愛媛県の地方銀行グループで、連結経常収益2,319億円は四国の百十四銀行・四国銀行を上回る。",
  "lineageLead": "1878年に川之石で開業した第二十九国立銀行など、愛媛の3系統の銀行が前身である。\n1941年に3行が合併して伊豫合同銀行を設立し、1951年に伊豫銀行へ商号を変更した。1992年に東邦相互銀行を救済合併し、2022年に単独株式移転で持株会社を設立した。県内の銀行合同を重ねて中核行の地位を固めた。",
  "foundingStory": true,
  "chapters": [
    {
      "start_year": 1878,
      "end_year": 1912,
      "main_title": "第二十九国立銀行・第五十二国立銀行の開業と今治商業銀行の設立",
      "subsections": [
        {
          "title": "川之石と松山に開いた2つの国立銀行と、今治商業銀行の設立",
          "text": "愛媛県で最初に開業した国立銀行は、1878年3月15日に営業を始めた、旧宇和島藩領の西宇和郡川之石浦の第二十九国立銀行。発端は、旧宇和島藩主の伊達宗城氏が東京に設けた第二十国立銀行の関係者が川之石を訪ね、蝋座取締の矢野小十郎氏へ設立を勧めたことにあった。川之石は幕末に藩へ9千両を献金した土地で、1875年には矢野小十郎氏らの潤業会社が製糸業向けに金貸しを営んでいた。松山の第五十二国立銀行は興産会社との共同出資案が崩れ、金禄公債だけで資本金7万円を用意して1878年9月25日に開業した。第五十二国立銀行は1897年に普通銀行へ転換し、1941年9月に伊豫合同銀行を設立した3行には松山五十二銀行が加わった。出資者層の厚さと既存の金融の下地が、県都より先に川之石へ銀行をもたらしたとみられる。\n\n今治では綿織物業の綿ネルへの転換を背景に、1892年5月に今治融通株式会社が設立され、翌1893年11月に今治銀行へ改称した。松山の第五十二国立銀行も1885年に今治支店を開設し、この年の預金残高を大きく押し上げた。日清戦争後の好況のなかで愛媛県では1896年に12行が設立され、今治商業銀行はその1つとして同年9月に設立された。1900年9月には今治商業銀行が今治銀行に合併され、存続した銀行は今治商業銀行へ改称。1941年9月、大蔵省の一県一行主義のもとで今治商業銀行・松山五十二銀行・豫州銀行の3行が合併し、伊豫合同銀行が発足した。綿織物の産地で地元資本の銀行が統合を重ねたことが、東予の商業金融の核を形づくったのだろう。",
          "references": [
            {
              "title": "伊予銀行『伊予銀行史』1971年",
              "year": null,
              "month": null,
              "date": null,
              "url": null,
              "quotes": []
            },
            {
              "title": "会社銀行八十年史（1955）「伊豫銀行」【創業】",
              "year": null,
              "month": null,
              "date": null,
              "url": null,
              "quotes": []
            },
            {
              "title": "証券 1971年 沿革",
              "year": null,
              "month": null,
              "date": null,
              "url": null,
              "quotes": []
            }
          ],
          "start_year": 1878,
          "opinionPos": [
            [
              346
            ],
            [
              313
            ]
          ]
        }
      ]
    }
  ],
  "long_term": [
    {
      "year": 1969,
      "month": 3,
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    {
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}
