{
  "spec_version": "3",
  "endpoint": "decisions",
  "stock_code": "4523",
  "company_name": "エーザイ",
  "content_lang": "ja",
  "meta_lang": "en",
  "canonical_url": "https://the-shashi.com/tse/4523/",
  "api_url": "/api/4523/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/4523/",
  "count": 2,
  "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": "mgi-pharma-acquisition-2007",
      "url": "/tse/4523/decisions/mgi-pharma-acquisition-2007/",
      "api_url": "/api/4523/decisions/mgi-pharma-acquisition-2007.json",
      "year": 2007,
      "month": 12,
      "type": "acquisition",
      "tags": [
        "ma-crossborder-out",
        "pf-diversify-related"
      ],
      "title": "米バイオ医薬MGIファーマの約39億ドル買収によるがん領域の強化",
      "subtitle": "アリセプトの特許切れを前に、内藤晴夫社長はなぜ日本の製薬として最大級の賭けに出たか",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "lecanemab-2023",
      "url": "/tse/4523/decisions/lecanemab-2023/",
      "api_url": "/api/4523/decisions/lecanemab-2023.json",
      "year": 2023,
      "month": 1,
      "type": "strategy",
      "tags": [
        "pf-focus"
      ],
      "title": "認知症領域への長期集中とバイオジェン提携によるレカネマブの実用化",
      "subtitle": "アデュカヌマブの蹉跌を越え、内藤晴夫CEOはなぜ認知症という未攻略の市場に賭け続けたか",
      "status": "implemented",
      "status_label": "実施"
    }
  ],
  "by_type": [
    {
      "key": "acquisition",
      "count": 1,
      "url": "/api/4523/decisions/by-type/acquisition.json"
    },
    {
      "key": "strategy",
      "count": 1,
      "url": "/api/4523/decisions/by-type/strategy.json"
    }
  ],
  "by_decade": [
    {
      "key": "2000s",
      "count": 1,
      "url": "/api/4523/decisions/by-decade/2000s.json"
    },
    {
      "key": "2020s",
      "count": 1,
      "url": "/api/4523/decisions/by-decade/2020s.json"
    }
  ]
}