{
  "spec_version": "3",
  "endpoint": "decisions",
  "stock_code": "8306",
  "company_name": "三菱UFJフィナンシャル・グループ",
  "content_lang": "ja",
  "meta_lang": "en",
  "canonical_url": "https://the-shashi.com/tse/8306/",
  "api_url": "/api/8306/decisions.json",
  "updated": "2026-08-05",
  "license": "© 2026 Yutaka Sugiura. All rights reserved.",
  "attribution": "The社史 (the-shashi.com) — https://the-shashi.com/tse/8306/",
  "count": 8,
  "description": "Index of this company's management decisions. One decision = one endpoint: follow api_url for the full dossier (background, the decision itself, outcome, quoted primary sources and references).",
  "decisions": [
    {
      "slug": "bank-of-tokyo-mitsubishi-1996",
      "url": "/tse/8306/decisions/bank-of-tokyo-mitsubishi-1996/",
      "api_url": "/api/8306/decisions/bank-of-tokyo-mitsubishi-1996.json",
      "year": 1996,
      "month": null,
      "type": "merger",
      "tags": [
        "ma-merger"
      ],
      "title": "三菱銀行と東京銀行の合併・東京三菱銀行の発足（1996年成立）",
      "subtitle": "金融ビッグバン前夜、財閥系の三菱銀行と外国為替専門の東京銀行はなぜ合併し、当時世界最大の銀行となったのか？",
      "status": "completed",
      "status_label": "成立"
    },
    {
      "slug": "mufg-formation-2005",
      "url": "/tse/8306/decisions/mufg-formation-2005/",
      "api_url": "/api/8306/decisions/mufg-formation-2005.json",
      "year": 2005,
      "month": null,
      "type": "integration",
      "tags": [
        "ma-merger",
        "ma-rescue"
      ],
      "title": "三菱東京フィナンシャル・グループとUFJホールディングスの経営統合（2005年成立・MUFG発足）",
      "subtitle": "UFJの経営難を起点に、住友信託との争奪を制して国内最大の金融グループはいかに生まれたのか？",
      "status": "completed",
      "status_label": "成立"
    },
    {
      "slug": "morgan-stanley-investment-2008",
      "url": "/tse/8306/decisions/morgan-stanley-investment-2008/",
      "api_url": "/api/8306/decisions/morgan-stanley-investment-2008.json",
      "year": 2008,
      "month": 9,
      "type": "alliance",
      "tags": [
        "ma-crossborder-out",
        "cp-crossholding"
      ],
      "title": "リーマン危機下のモルガン・スタンレーへの90億ドル出資",
      "subtitle": "危機の底で沈む米証券大手へ、なぜ日本の銀行は祝日に90億ドルの小切手を差し出したのか",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "mumss-jv-2010",
      "url": "/tse/8306/decisions/mumss-jv-2010/",
      "api_url": "/api/8306/decisions/mumss-jv-2010.json",
      "year": 2010,
      "month": 3,
      "type": "alliance",
      "tags": [
        "ma-pmi"
      ],
      "title": "三菱UFJモルガン・スタンレー証券の設立——米投資銀行との日本証券合弁",
      "subtitle": "90億ドルを投じた米投資銀行と、なぜ国内の証券事業を2つの合弁へ組み替えたのか",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "ayudhya-acquisition-2013",
      "url": "/tse/8306/decisions/ayudhya-acquisition-2013/",
      "api_url": "/api/8306/decisions/ayudhya-acquisition-2013.json",
      "year": 2013,
      "month": 7,
      "type": "acquisition",
      "tags": [
        "ma-crossborder-out",
        "gl-entry"
      ],
      "title": "タイ・アユタヤ銀行（クルンシィ）のTOB買収——アジア商業銀行基盤の獲得",
      "subtitle": "国内で稼ぐ力が細る銀行が、なぜ約5,360億円を投じてタイ第5位の銀行を買い、自前のバンコク支店までそこへ明け渡したのか",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "bank-danamon-2019",
      "url": "/tse/8306/decisions/bank-danamon-2019/",
      "api_url": "/api/8306/decisions/bank-danamon-2019.json",
      "year": 2019,
      "month": null,
      "type": "acquisition",
      "tags": [
        "ma-crossborder-out",
        "gl-entry"
      ],
      "title": "インドネシア・バンクダナモンの段階取得と94%子会社化",
      "subtitle": "国内で利ざやが細る大手銀行は、なぜ純資産の約2倍を払ってインドネシアの銀行を段階的に丸ごと抱え込んだのか",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "union-bank-sale-2022",
      "url": "/tse/8306/decisions/union-bank-sale-2022/",
      "api_url": "/api/8306/decisions/union-bank-sale-2022.json",
      "year": 2022,
      "month": null,
      "type": "divestiture",
      "tags": [
        "gl-retreat",
        "pf-exit",
        "pf-focus"
      ],
      "title": "MUFGユニオンバンク売却——米西海岸リテールからの撤退と法人取引への集中",
      "subtitle": "西海岸に根を張った米商業銀行を、なぜ約80億ドルで売り、法人取引へ絞ったのか",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "safe-deposit-scandal-2025",
      "url": "/tse/8306/decisions/safe-deposit-scandal-2025/",
      "api_url": "/api/8306/decisions/safe-deposit-scandal-2025.json",
      "year": 2025,
      "month": 1,
      "type": "misconduct",
      "title": "三菱UFJ銀行・貸金庫窃取事件への対応と内部管理の立て直し",
      "subtitle": "なぜ長期の窃取を見抜けなかったか——信頼を根幹とするメガバンクが問われたガバナンス",
      "status": "implemented",
      "status_label": "実施"
    }
  ],
  "by_type": [
    {
      "key": "acquisition",
      "count": 2,
      "url": "/api/8306/decisions/by-type/acquisition.json"
    },
    {
      "key": "alliance",
      "count": 2,
      "url": "/api/8306/decisions/by-type/alliance.json"
    },
    {
      "key": "divestiture",
      "count": 1,
      "url": "/api/8306/decisions/by-type/divestiture.json"
    },
    {
      "key": "integration",
      "count": 1,
      "url": "/api/8306/decisions/by-type/integration.json"
    },
    {
      "key": "merger",
      "count": 1,
      "url": "/api/8306/decisions/by-type/merger.json"
    },
    {
      "key": "misconduct",
      "count": 1,
      "url": "/api/8306/decisions/by-type/misconduct.json"
    }
  ],
  "by_decade": [
    {
      "key": "1990s",
      "count": 1,
      "url": "/api/8306/decisions/by-decade/1990s.json"
    },
    {
      "key": "2000s",
      "count": 2,
      "url": "/api/8306/decisions/by-decade/2000s.json"
    },
    {
      "key": "2010s",
      "count": 3,
      "url": "/api/8306/decisions/by-decade/2010s.json"
    },
    {
      "key": "2020s",
      "count": 2,
      "url": "/api/8306/decisions/by-decade/2020s.json"
    }
  ]
}