{
  "spec_version": "3",
  "endpoint": "decisions",
  "stock_code": "4568",
  "company_name": "第一三共",
  "content_lang": "ja",
  "meta_lang": "en",
  "canonical_url": "https://the-shashi.com/tse/4568/",
  "api_url": "/api/4568/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/4568/",
  "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": "daiichi-sankyo-formation-2005",
      "url": "/tse/4568/decisions/daiichi-sankyo-formation-2005/",
      "api_url": "/api/4568/decisions/daiichi-sankyo-formation-2005.json",
      "year": 2005,
      "month": 2,
      "type": "integration",
      "tags": [
        "ma-merger",
        "cp-holdings"
      ],
      "title": "三共と第一製薬の経営統合と第一三共の誕生（2005年成立）",
      "subtitle": "なぜ大手2社は合併ではなく共同持株会社から始め、2年かけて完全な合併へと進んだのか？",
      "status": "completed",
      "status_label": "成立"
    },
    {
      "slug": "ranbaxy-acquisition-2008",
      "url": "/tse/4568/decisions/ranbaxy-acquisition-2008/",
      "api_url": "/api/4568/decisions/ranbaxy-acquisition-2008.json",
      "year": 2008,
      "month": 6,
      "type": "acquisition",
      "tags": [
        "ma-crossborder-out",
        "pf-diversify-related",
        "gl-expansion"
      ],
      "title": "インド・ランバクシーの買収と「複眼経営」への移行",
      "subtitle": "新薬か後発薬か、先進国か新興国か——約4,900億円のクロスボーダーM&Aは何を狙い、なぜ躓いたか",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "oncology-pivot-2015",
      "url": "/tse/4568/decisions/oncology-pivot-2015/",
      "api_url": "/api/4568/decisions/oncology-pivot-2015.json",
      "year": 2015,
      "month": 5,
      "type": "transformation",
      "tags": [
        "pf-focus",
        "gl-retreat",
        "bm-core-shift"
      ],
      "title": "複眼経営を捨て、がんに絞る——中山讓治氏の選択と集中",
      "subtitle": "新薬・後発薬・OTC・ワクチンの4本柱を畳み、海外後発薬から退いて自社ADCへ賭け直した2015年の転換",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "enhertu-alliance-2019",
      "url": "/tse/4568/decisions/enhertu-alliance-2019/",
      "api_url": "/api/4568/decisions/enhertu-alliance-2019.json",
      "year": 2019,
      "month": 3,
      "type": "alliance",
      "tags": [
        "st-tech",
        "bm-core-shift"
      ],
      "title": "エンハーツとアストラゼネカ提携——がん事業への転換",
      "subtitle": "自社創製の抗体薬物複合体を、なぜ英大手と最大69億ドルで組んだのか",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "otc-divestiture-2026",
      "url": "/tse/4568/decisions/otc-divestiture-2026/",
      "api_url": "/api/4568/decisions/otc-divestiture-2026.json",
      "year": 2026,
      "month": 4,
      "type": "divestiture",
      "tags": [
        "pf-exit",
        "pf-focus"
      ],
      "title": "市販薬子会社・第一三共ヘルスケアのサントリーHDへの譲渡",
      "subtitle": "高収益の優良事業を、なぜ2,465億円で手放すのか——革新的医薬への集中をめぐる選択",
      "status": "implemented",
      "status_label": "実施"
    }
  ],
  "by_type": [
    {
      "key": "acquisition",
      "count": 1,
      "url": "/api/4568/decisions/by-type/acquisition.json"
    },
    {
      "key": "alliance",
      "count": 1,
      "url": "/api/4568/decisions/by-type/alliance.json"
    },
    {
      "key": "divestiture",
      "count": 1,
      "url": "/api/4568/decisions/by-type/divestiture.json"
    },
    {
      "key": "integration",
      "count": 1,
      "url": "/api/4568/decisions/by-type/integration.json"
    },
    {
      "key": "transformation",
      "count": 1,
      "url": "/api/4568/decisions/by-type/transformation.json"
    }
  ],
  "by_decade": [
    {
      "key": "2000s",
      "count": 2,
      "url": "/api/4568/decisions/by-decade/2000s.json"
    },
    {
      "key": "2010s",
      "count": 2,
      "url": "/api/4568/decisions/by-decade/2010s.json"
    },
    {
      "key": "2020s",
      "count": 1,
      "url": "/api/4568/decisions/by-decade/2020s.json"
    }
  ]
}