{
  "spec_version": "3",
  "endpoint": "decisions",
  "stock_code": "4689",
  "company_name": "LINEヤフー",
  "content_lang": "ja",
  "meta_lang": "en",
  "canonical_url": "https://the-shashi.com/tse/4689/",
  "api_url": "/api/4689/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/4689/",
  "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": "yahoo-shopping-auction-1999",
      "url": "/tse/4689/decisions/yahoo-shopping-auction-1999/",
      "api_url": "/api/4689/decisions/yahoo-shopping-auction-1999.json",
      "year": 1999,
      "month": 9,
      "type": "alliance",
      "tags": [
        "pf-diversify-related"
      ],
      "title": "ヤフーのYahoo!ショッピング・Yahoo!オークション同時展開と分かれたECの明暗",
      "subtitle": "同じ集客基盤から出した二事業が、なぜ対照的な軌跡をたどったのか",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "yahoo-bb-broadband-2001",
      "url": "/tse/4689/decisions/yahoo-bb-broadband-2001/",
      "api_url": "/api/4689/decisions/yahoo-bb-broadband-2001.json",
      "year": 2001,
      "month": 9,
      "type": "alliance",
      "tags": [
        "pf-diversify-related",
        "bm-model-shift"
      ],
      "title": "ヤフーのYahoo! BB参入とモデム販売収入への傾斜",
      "subtitle": "広告で稼ぐ高収益ポータルは、なぜソフトバンクのADSL賭博で低採算のハード販売を抱え込んだのか",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "bakusoku-management-2012",
      "url": "/tse/4689/decisions/bakusoku-management-2012/",
      "api_url": "/api/4689/decisions/bakusoku-management-2012.json",
      "year": 2012,
      "month": 4,
      "type": "succession",
      "tags": [
        "gv-succession"
      ],
      "title": "ヤフーの「爆速経営」への転換と宮坂体制の発足",
      "subtitle": "PCポータルの成功体験がスマホ対応の遅れを構造化するなか、ヤフーはなぜ世代交代と意思決定構造の全面刷新を選んだのか",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "ecommerce-revolution-2013",
      "url": "/tse/4689/decisions/ecommerce-revolution-2013/",
      "api_url": "/api/4689/decisions/ecommerce-revolution-2013.json",
      "year": 2013,
      "month": 10,
      "type": "transformation",
      "tags": [
        "bm-model-shift",
        "st-pricing"
      ],
      "title": "ヤフーの「eコマース革命」——出店料無料化による収益構造転換",
      "subtitle": "楽天・Amazonに長年劣勢のEC事業を、なぜ出店料ゼロと引き換えに広告モデルへ作り替えたのか",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "askul-consolidation-2015",
      "url": "/tse/4689/decisions/askul-consolidation-2015/",
      "api_url": "/api/4689/decisions/askul-consolidation-2015.json",
      "year": 2015,
      "month": 5,
      "type": "acquisition",
      "tags": [
        "pf-vertical"
      ],
      "title": "ヤフーによるアスクル連結子会社化と親子上場ガバナンス",
      "subtitle": "物流を持たぬECの限界を埋める提携が、なぜ支配株主と少数株主の対立へ発展したのか",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "line-integration-2019",
      "url": "/tse/4689/decisions/line-integration-2019/",
      "api_url": "/api/4689/decisions/line-integration-2019.json",
      "year": 2019,
      "month": 10,
      "type": "acquisition",
      "tags": [
        "ma-merger",
        "cp-holdings"
      ],
      "title": "ヤフーのZホールディングス改称とLINEとの経営統合",
      "subtitle": "PayPayとLINEペイの消耗戦の裏で、なぜ競合統合による防衛的再編を選んだのか",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "zozo-acquisition-2019",
      "url": "/tse/4689/decisions/zozo-acquisition-2019/",
      "api_url": "/api/4689/decisions/zozo-acquisition-2019.json",
      "year": 2019,
      "month": 9,
      "type": "acquisition",
      "tags": [
        "pf-diversify-related"
      ],
      "title": "ヤフー（Zホールディングス）によるZOZO買収と親子上場",
      "subtitle": "創業者の株式処分ニーズが、なぜ買い手を規定し4000億円の資本再編に発展したのか",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "line-yahoo-2023",
      "url": "/tse/4689/decisions/line-yahoo-2023/",
      "api_url": "/api/4689/decisions/line-yahoo-2023.json",
      "year": 2023,
      "month": 4,
      "type": "merger",
      "tags": [
        "ma-merger",
        "cp-holdings"
      ],
      "title": "Zホールディングス・ヤフー・LINEのグループ再編とLINEヤフー発足（2023年成立）",
      "subtitle": "なぜ経営統合からわずか2年でグループ5社の再編に踏み切り、意思決定を一本化したのか？",
      "status": "completed",
      "status_label": "成立"
    }
  ],
  "by_type": [
    {
      "key": "acquisition",
      "count": 3,
      "url": "/api/4689/decisions/by-type/acquisition.json"
    },
    {
      "key": "alliance",
      "count": 2,
      "url": "/api/4689/decisions/by-type/alliance.json"
    },
    {
      "key": "merger",
      "count": 1,
      "url": "/api/4689/decisions/by-type/merger.json"
    },
    {
      "key": "succession",
      "count": 1,
      "url": "/api/4689/decisions/by-type/succession.json"
    },
    {
      "key": "transformation",
      "count": 1,
      "url": "/api/4689/decisions/by-type/transformation.json"
    }
  ],
  "by_decade": [
    {
      "key": "1990s",
      "count": 1,
      "url": "/api/4689/decisions/by-decade/1990s.json"
    },
    {
      "key": "2000s",
      "count": 1,
      "url": "/api/4689/decisions/by-decade/2000s.json"
    },
    {
      "key": "2010s",
      "count": 5,
      "url": "/api/4689/decisions/by-decade/2010s.json"
    },
    {
      "key": "2020s",
      "count": 1,
      "url": "/api/4689/decisions/by-decade/2020s.json"
    }
  ]
}