{
  "spec_version": "3",
  "endpoint": "decisions",
  "stock_code": "8309",
  "company_name": "三井住友トラストグループ",
  "content_lang": "ja",
  "meta_lang": "en",
  "canonical_url": "https://the-shashi.com/tse/8309/",
  "api_url": "/api/8309/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/8309/",
  "count": 5,
  "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": "land-trust-first-1984",
      "url": "/tse/8309/decisions/land-trust-first-1984/",
      "api_url": "/api/8309/decisions/land-trust-first-1984.json",
      "year": 1984,
      "month": 6,
      "type": "new_business",
      "tags": [
        "pf-diversify-related",
        "bm-model-shift"
      ],
      "title": "本邦第1号の土地信託の受託と、公有地土地信託への参入",
      "subtitle": "貸付信託で基幹産業へ長期資金を流す仕組みが揺らぐなかで、住友信託銀行は次の収益源をどこに置いたか",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "real-estate-loan-cleanup-1994",
      "url": "/tse/8309/decisions/real-estate-loan-cleanup-1994/",
      "api_url": "/api/8309/decisions/real-estate-loan-cleanup-1994.json",
      "year": 1994,
      "month": null,
      "type": "restructuring",
      "tags": [
        "tr-turnaround",
        "tr-restructuring"
      ],
      "title": "麻布グループ再建案の策定と、1994年度の不良債権2,000億円の償却",
      "subtitle": "小糸製作所株の売却を待つあいだに融資は膨らんだ——三井信託銀行は不動産融資の後始末をいつ決めたか",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "sumitomo-trust-ufj-2004",
      "url": "/tse/8309/decisions/sumitomo-trust-ufj-2004/",
      "api_url": "/api/8309/decisions/sumitomo-trust-ufj-2004.json",
      "year": 2004,
      "month": 5,
      "type": "merger",
      "tags": [
        "ma-merger",
        "ma-breakup"
      ],
      "title": "住友信託銀行とUFJの信託事業統合（2004年破談）",
      "subtitle": "なぜ基本合意した信託事業の統合がUFJの白紙撤回で破談し、25億円の和解に至ったのか？",
      "status": "terminated",
      "status_label": "破談"
    },
    {
      "slug": "mitsui-sumitomo-trust-merger-2011",
      "url": "/tse/8309/decisions/mitsui-sumitomo-trust-merger-2011/",
      "api_url": "/api/8309/decisions/mitsui-sumitomo-trust-merger-2011.json",
      "year": 2011,
      "month": null,
      "type": "merger",
      "tags": [
        "ma-merger",
        "cp-holdings"
      ],
      "title": "中央三井トラスト・グループと住友信託銀行グループの経営統合、三井住友トラスト・ホールディングスの発足",
      "subtitle": "三井系と住友系の専業信託は一つになれるか——「The Trust Bank」を掲げた統合の設計",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "proxy-miscounting-2020",
      "url": "/tse/8309/decisions/proxy-miscounting-2020/",
      "api_url": "/api/8309/decisions/proxy-miscounting-2020.json",
      "year": 2020,
      "month": 9,
      "type": "misconduct",
      "tags": [
        "tr-scandal",
        "gv-board",
        "cp-activist"
      ],
      "title": "議決権行使書集計における先付処理の廃止と、975社分の再集計の公表",
      "subtitle": "期限日に届いた1日分は、なぜ20年近く数えられなかったのか——専業信託が担う証券代行の実務慣行",
      "status": "implemented",
      "status_label": "実施"
    }
  ],
  "by_type": [
    {
      "key": "merger",
      "count": 2,
      "url": "/api/8309/decisions/by-type/merger.json"
    },
    {
      "key": "misconduct",
      "count": 1,
      "url": "/api/8309/decisions/by-type/misconduct.json"
    },
    {
      "key": "new_business",
      "count": 1,
      "url": "/api/8309/decisions/by-type/new_business.json"
    },
    {
      "key": "restructuring",
      "count": 1,
      "url": "/api/8309/decisions/by-type/restructuring.json"
    }
  ],
  "by_decade": [
    {
      "key": "1980s",
      "count": 1,
      "url": "/api/8309/decisions/by-decade/1980s.json"
    },
    {
      "key": "1990s",
      "count": 1,
      "url": "/api/8309/decisions/by-decade/1990s.json"
    },
    {
      "key": "2000s",
      "count": 1,
      "url": "/api/8309/decisions/by-decade/2000s.json"
    },
    {
      "key": "2010s",
      "count": 1,
      "url": "/api/8309/decisions/by-decade/2010s.json"
    },
    {
      "key": "2020s",
      "count": 1,
      "url": "/api/8309/decisions/by-decade/2020s.json"
    }
  ]
}