{
  "spec_version": "3",
  "endpoint": "decisions",
  "stock_code": "9984",
  "company_name": "ソフトバンクグループ",
  "content_lang": "ja",
  "meta_lang": "en",
  "canonical_url": "https://the-shashi.com/tse/9984/",
  "api_url": "/api/9984/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/9984/",
  "count": 14,
  "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": "nihon-softbank-founding-1981",
      "url": "/tse/9984/decisions/nihon-softbank-founding-1981/",
      "api_url": "/api/9984/decisions/nihon-softbank-founding-1981.json",
      "year": 1981,
      "month": 9,
      "type": "founding",
      "title": "日本ソフトバンクの創業とパソコンソフト卸売事業の立ち上げ",
      "subtitle": "特許売却で得た資金を元手に、孫正義氏はソフト流通の空白と財界の信用をどう結び合わせたか",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "yahoo-japan-jv-1996",
      "url": "/tse/9984/decisions/yahoo-japan-jv-1996/",
      "api_url": "/api/9984/decisions/yahoo-japan-jv-1996.json",
      "year": 1996,
      "month": 1,
      "type": "alliance",
      "tags": [
        "cp-crossholding",
        "st-platform"
      ],
      "title": "米ヤフーとの合弁によるヤフー株式会社の設立",
      "subtitle": "社員数名のベンチャーへの2億円——孫正義氏はなぜ情報網で見つけた無名の検索会社に賭け、それをグループ最大級の含み資産に変えたのか",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "expansion-debt-concern-1997",
      "url": "/tse/9984/decisions/expansion-debt-concern-1997/",
      "api_url": "/api/9984/decisions/expansion-debt-concern-1997.json",
      "year": 1997,
      "month": 10,
      "type": "new_business",
      "tags": [
        "ma-rollup",
        "cp-finance"
      ],
      "title": "相次ぐ買収と「拡大路線」への懸念",
      "subtitle": "売上を超える借金を抱えて買い続ける——市場が財務体力を疑うなか、孫正義氏はなぜ「買収はやり続ける」と言い切ったのか",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "bubble-burst-asset-sale-2000",
      "url": "/tse/9984/decisions/bubble-burst-asset-sale-2000/",
      "api_url": "/api/9984/decisions/bubble-burst-asset-sale-2000.json",
      "year": 2000,
      "month": 3,
      "type": "divestiture",
      "tags": [
        "pf-exit",
        "ma-rescue",
        "cp-finance"
      ],
      "title": "ネットバブル崩壊下の資産圧縮と日債銀買収",
      "subtitle": "時価総額20兆円のピークから一転——孫正義氏はなぜ株を売って負債を圧縮しながら、批判のなかで破綻銀行を買ったのか",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "adsl-yahoo-bb-2001",
      "url": "/tse/9984/decisions/adsl-yahoo-bb-2001/",
      "api_url": "/api/9984/decisions/adsl-yahoo-bb-2001.json",
      "year": 2001,
      "month": 9,
      "type": "new_business",
      "tags": [
        "st-capex",
        "bm-digital"
      ],
      "title": "ADSL参入とYahoo!BBの危機",
      "subtitle": "売上の2倍を超す赤字を抱えて——孫正義氏はなぜ「つまずけば解体」と言われながらブロードバンドへの先行投資を続けたのか",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "hawks-acquisition-2004",
      "url": "/tse/9984/decisions/hawks-acquisition-2004/",
      "api_url": "/api/9984/decisions/hawks-acquisition-2004.json",
      "year": 2004,
      "month": 10,
      "type": "new_business",
      "tags": [
        "st-brand",
        "pf-diversify-unrelated"
      ],
      "title": "福岡ダイエーホークスの買収と球団保有",
      "subtitle": "「誰も本気にしない」と言われた買収宣言——孫正義氏はなぜ利益の出ない球団に、Yahoo!BBのブランドづくりを託したのか",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "nippon-telecom-acquisition-2004",
      "url": "/tse/9984/decisions/nippon-telecom-acquisition-2004/",
      "api_url": "/api/9984/decisions/nippon-telecom-acquisition-2004.json",
      "year": 2004,
      "month": 7,
      "type": "acquisition",
      "tags": [
        "ma-rollup",
        "pf-vertical"
      ],
      "title": "日本テレコムの買収と固定・携帯通信への布石",
      "subtitle": "NTT一強の固定通信市場へ約3,400億円で参入——孫正義氏はなぜADSLの次に「法人と携帯」の足場を日本テレコムに求めたのか",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "sprint-acquisition-2013",
      "url": "/tse/9984/decisions/sprint-acquisition-2013/",
      "api_url": "/api/9984/decisions/sprint-acquisition-2013.json",
      "year": 2013,
      "month": null,
      "type": "acquisition",
      "tags": [
        "ma-crossborder-out",
        "gl-entry"
      ],
      "title": "米スプリント買収による北米携帯市場への進出",
      "subtitle": "国内3位のキャリアが、巨大な米国市場に約1.8兆円を賭けられるか",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "arm-acquisition-2016",
      "url": "/tse/9984/decisions/arm-acquisition-2016/",
      "api_url": "/api/9984/decisions/arm-acquisition-2016.json",
      "year": 2016,
      "month": 7,
      "type": "acquisition",
      "tags": [
        "ma-crossborder-out",
        "st-tech"
      ],
      "title": "英ARM買収——IoT・AI時代を見据えた過去最大3.3兆円のM&A",
      "subtitle": "通信・投資会社がなぜ半導体設計の要に3.3兆円を投じたのか",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "vision-fund-2017",
      "url": "/tse/9984/decisions/vision-fund-2017/",
      "api_url": "/api/9984/decisions/vision-fund-2017.json",
      "year": 2017,
      "month": 5,
      "type": "new_business",
      "tags": [
        "bm-core-shift",
        "cp-finance"
      ],
      "title": "ソフトバンク・ビジョン・ファンドの組成",
      "subtitle": "自己資金の3倍の外部資金をてこに——孫正義氏はなぜ事業会社から世界最大級の投資家へと自らを作り替えたのか",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "arm-nvidia-sale-2020",
      "url": "/tse/9984/decisions/arm-nvidia-sale-2020/",
      "api_url": "/api/9984/decisions/arm-nvidia-sale-2020.json",
      "year": 2020,
      "month": 9,
      "type": "divestiture",
      "tags": [
        "pf-exit",
        "ma-breakup",
        "cp-finance"
      ],
      "title": "米エヌビディアへのアーム売却——最大400億ドルの契約と、規制が壊した世紀のディール",
      "subtitle": "財務防衛のために虎の子を手放すか、AI時代の中核として抱え続けるか——孫正義氏が選んだ売却は、なぜ2022年2月に破談へと至ったのか",
      "status": "terminated",
      "status_label": "破談"
    },
    {
      "slug": "elliott-buyback-2020",
      "url": "/tse/9984/decisions/elliott-buyback-2020/",
      "api_url": "/api/9984/decisions/elliott-buyback-2020.json",
      "year": 2020,
      "month": 3,
      "type": "capital",
      "tags": [
        "cp-activist"
      ],
      "title": "エリオットの株主還元要求と、4.5兆円資産売却・2.5兆円自社株買い",
      "subtitle": "保有株の価値と時価のかい離を、孫正義氏はアクティビストの催促のなかでどう埋めようとしたか",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "ampere-acquisition-2025",
      "url": "/tse/9984/decisions/ampere-acquisition-2025/",
      "api_url": "/api/9984/decisions/ampere-acquisition-2025.json",
      "year": 2025,
      "month": 3,
      "type": "acquisition",
      "tags": [
        "ma-crossborder-out",
        "pf-vertical",
        "st-tech"
      ],
      "title": "米半導体設計Ampere Computingの65億ドル買収",
      "subtitle": "設計図の提供者から、チップの作り手へ——孫正義氏はなぜサーバーCPUの新興企業に約1兆円を投じたのか",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "openai-stargate-2025",
      "url": "/tse/9984/decisions/openai-stargate-2025/",
      "api_url": "/api/9984/decisions/openai-stargate-2025.json",
      "year": 2025,
      "month": 3,
      "type": "new_business",
      "tags": [
        "st-tech",
        "cp-finance"
      ],
      "title": "OpenAIへの巨額出資とAIインフラ「スターゲート」",
      "subtitle": "情報革命の本命を人工知能に賭ける——孫正義氏はなぜOpenAIへ累計646億ドルを投じ、米国のAIインフラに5000億ドルを構想したのか",
      "status": "implemented",
      "status_label": "実施"
    }
  ],
  "by_type": [
    {
      "key": "acquisition",
      "count": 4,
      "url": "/api/9984/decisions/by-type/acquisition.json"
    },
    {
      "key": "alliance",
      "count": 1,
      "url": "/api/9984/decisions/by-type/alliance.json"
    },
    {
      "key": "capital",
      "count": 1,
      "url": "/api/9984/decisions/by-type/capital.json"
    },
    {
      "key": "divestiture",
      "count": 2,
      "url": "/api/9984/decisions/by-type/divestiture.json"
    },
    {
      "key": "founding",
      "count": 1,
      "url": "/api/9984/decisions/by-type/founding.json"
    },
    {
      "key": "new_business",
      "count": 5,
      "url": "/api/9984/decisions/by-type/new_business.json"
    }
  ],
  "by_decade": [
    {
      "key": "1980s",
      "count": 1,
      "url": "/api/9984/decisions/by-decade/1980s.json"
    },
    {
      "key": "1990s",
      "count": 2,
      "url": "/api/9984/decisions/by-decade/1990s.json"
    },
    {
      "key": "2000s",
      "count": 4,
      "url": "/api/9984/decisions/by-decade/2000s.json"
    },
    {
      "key": "2010s",
      "count": 3,
      "url": "/api/9984/decisions/by-decade/2010s.json"
    },
    {
      "key": "2020s",
      "count": 4,
      "url": "/api/9984/decisions/by-decade/2020s.json"
    }
  ]
}