{
  "spec_version": "3",
  "endpoint": "decisions",
  "stock_code": "4751",
  "company_name": "サイバーエージェント",
  "content_lang": "ja",
  "meta_lang": "en",
  "canonical_url": "https://the-shashi.com/tse/4751/",
  "api_url": "/api/4751/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/4751/",
  "count": 9,
  "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": "net-bubble-2000",
      "url": "/tse/4751/decisions/net-bubble-2000/",
      "api_url": "/api/4751/decisions/net-bubble-2000.json",
      "year": 2000,
      "month": 3,
      "type": "capital",
      "tags": [
        "cp-listing"
      ],
      "title": "ITバブル頂点での東証マザーズ上場と株価暴落",
      "subtitle": "創業2年での上場と「天国と地獄」——藤田晋氏は何を得て、何を学んだか",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "murakami-fund-2001",
      "url": "/tse/4751/decisions/murakami-fund-2001/",
      "api_url": "/api/4751/decisions/murakami-fund-2001.json",
      "year": 2001,
      "month": 5,
      "type": "shareholder_proposal",
      "tags": [
        "cp-activist",
        "ma-hostile"
      ],
      "title": "村上ファンドの接近と買収防衛",
      "subtitle": "現金が株価を上回った会社を、藤田晋氏はどう守り抜いたか",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "retention-2003",
      "url": "/tse/4751/decisions/retention-2003/",
      "api_url": "/api/4751/decisions/retention-2003.json",
      "year": 2003,
      "month": 9,
      "type": "succession",
      "tags": [
        "gv-labor"
      ],
      "title": "「終身雇用」の方針と離職率低減への人事改革",
      "subtitle": "離職率30%のベンチャーが、なぜ長く働く会社をめざしたか",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "ameba-blog-2004",
      "url": "/tse/4751/decisions/ameba-blog-2004/",
      "api_url": "/api/4751/decisions/ameba-blog-2004.json",
      "year": 2004,
      "month": 9,
      "type": "new_business",
      "tags": [
        "bm-model-shift",
        "pf-diversify-related"
      ],
      "title": "アメーバブログの立ち上げとメディア事業への参入",
      "subtitle": "広告代理からメディア保有へ——藤田晋氏はなぜ「自らやってみせる」道を選んだか",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "engineer-hiring-2006",
      "url": "/tse/4751/decisions/engineer-hiring-2006/",
      "api_url": "/api/4751/decisions/engineer-hiring-2006.json",
      "year": 2006,
      "month": 5,
      "type": "restructuring",
      "tags": [
        "pf-vertical"
      ],
      "title": "エンジニア採用の本格化と技術の内製化",
      "subtitle": "営業の会社が技術を持つ会社へ——アメーバの急成長が迫った転換",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "zelvia-acquisition-2018",
      "url": "/tse/4751/decisions/zelvia-acquisition-2018/",
      "api_url": "/api/4751/decisions/zelvia-acquisition-2018.json",
      "year": 2018,
      "month": 10,
      "type": "acquisition",
      "tags": [
        "pf-diversify-unrelated"
      ],
      "title": "FC町田ゼルビアの子会社化とスポーツ事業への参入",
      "subtitle": "「サッカーが好きだから」——藤田晋社長はなぜJリーグクラブの経営に踏み込んだか",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "governance-reform-2019",
      "url": "/tse/4751/decisions/governance-reform-2019/",
      "api_url": "/api/4751/decisions/governance-reform-2019.json",
      "year": 2019,
      "month": 12,
      "type": "succession",
      "tags": [
        "gv-board"
      ],
      "title": "社長選任賛成率57.56%を機とするコーポレートガバナンス改革",
      "subtitle": "「あわや解任」の株主総会が、創業者主導の取締役会をどう変えたか",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "abema-worldcup-2022",
      "url": "/tse/4751/decisions/abema-worldcup-2022/",
      "api_url": "/api/4751/decisions/abema-worldcup-2022.json",
      "year": 2022,
      "month": 3,
      "type": "alliance",
      "tags": [
        "st-platform"
      ],
      "title": "ABEMAによるサッカーW杯全64試合の無料生中継",
      "subtitle": "累積赤字を抱えるメディア事業に、藤田晋社長はなぜ史上最大の投資を重ねたか",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "succession-plan-2023",
      "url": "/tse/4751/decisions/succession-plan-2023/",
      "api_url": "/api/4751/decisions/succession-plan-2023.json",
      "year": 2023,
      "month": 3,
      "type": "succession",
      "tags": [
        "gv-succession"
      ],
      "title": "サクセッションプランの公表と創業者からの世代交代",
      "subtitle": "創業25年、藤田晋社長はなぜ好調のさなかに「社長を辞める」と決めたか",
      "status": "implemented",
      "status_label": "実施"
    }
  ],
  "by_type": [
    {
      "key": "acquisition",
      "count": 1,
      "url": "/api/4751/decisions/by-type/acquisition.json"
    },
    {
      "key": "alliance",
      "count": 1,
      "url": "/api/4751/decisions/by-type/alliance.json"
    },
    {
      "key": "capital",
      "count": 1,
      "url": "/api/4751/decisions/by-type/capital.json"
    },
    {
      "key": "new_business",
      "count": 1,
      "url": "/api/4751/decisions/by-type/new_business.json"
    },
    {
      "key": "restructuring",
      "count": 1,
      "url": "/api/4751/decisions/by-type/restructuring.json"
    },
    {
      "key": "shareholder_proposal",
      "count": 1,
      "url": "/api/4751/decisions/by-type/shareholder_proposal.json"
    },
    {
      "key": "succession",
      "count": 3,
      "url": "/api/4751/decisions/by-type/succession.json"
    }
  ],
  "by_decade": [
    {
      "key": "2000s",
      "count": 5,
      "url": "/api/4751/decisions/by-decade/2000s.json"
    },
    {
      "key": "2010s",
      "count": 2,
      "url": "/api/4751/decisions/by-decade/2010s.json"
    },
    {
      "key": "2020s",
      "count": 2,
      "url": "/api/4751/decisions/by-decade/2020s.json"
    }
  ]
}