{
  "spec_version": "3",
  "endpoint": "decisions",
  "stock_code": "6758",
  "company_name": "ソニー",
  "content_lang": "ja",
  "meta_lang": "en",
  "canonical_url": "https://the-shashi.com/tse/6758/",
  "api_url": "/api/6758/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/6758/",
  "count": 12,
  "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": "founding-1946",
      "url": "/tse/6758/decisions/founding-1946/",
      "api_url": "/api/6758/decisions/founding-1946.json",
      "year": 1946,
      "month": 5,
      "type": "founding",
      "title": "ソニー創業——井深大氏と盛田昭夫氏が資本金19万円で興した「理想工場」",
      "subtitle": "焼け跡の百貨店3階に集った20人は、無名の技術ベンチャーをどう立ち上げ、大手に伍したか",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "totsuko-founding-1946",
      "url": "/tse/6758/decisions/totsuko-founding-1946/",
      "api_url": "/api/6758/decisions/totsuko-founding-1946.json",
      "year": 1946,
      "month": 5,
      "type": "founding",
      "tags": [
        "st-tech",
        "pf-focus"
      ],
      "title": "井深大氏らが疎開工場を捨て、資本金19万円で東京通信工業を設立",
      "subtitle": "りんご園の疎開工場に残るか、8人で焼け跡へ出るか——軍需を失った技術者はなぜ「理想工場」を先に掲げたか",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "sony-brand-export-1955",
      "url": "/tse/6758/decisions/sony-brand-export-1955/",
      "api_url": "/api/6758/decisions/sony-brand-export-1955.json",
      "year": 1955,
      "month": 8,
      "type": "founding",
      "tags": [
        "st-brand",
        "gl-entry"
      ],
      "title": "トランジスタ技術の導入と自社ブランド「SONY」による米国輸出",
      "subtitle": "下請けとしての大量注文か、無名でも自社ブランドか——製造業者から日本発のグローバルブランドへ賭けた選択",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "cbs-columbia-acquisition-1989",
      "url": "/tse/6758/decisions/cbs-columbia-acquisition-1989/",
      "api_url": "/api/6758/decisions/cbs-columbia-acquisition-1989.json",
      "year": 1989,
      "month": null,
      "type": "acquisition",
      "tags": [
        "ma-crossborder-out",
        "pf-vertical"
      ],
      "title": "CBSレコードとコロンビア映画の連続買収──ハードとソフトの垂直統合",
      "subtitle": "機器だけでは規格に勝てないのか——ハードとソフトを一体で握るために、ソニーが2年で投じた60億ドルの賭け",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "playstation-launch-1994",
      "url": "/tse/6758/decisions/playstation-launch-1994/",
      "api_url": "/api/6758/decisions/playstation-launch-1994.json",
      "year": 1994,
      "month": null,
      "type": "founding",
      "tags": [
        "pf-diversify-related",
        "st-platform"
      ],
      "title": "PlayStation参入と家庭用ゲーム市場への進出",
      "subtitle": "任天堂との決裂を、ソニーはどう自前のゲーム機事業へ転じたか",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "sony-ericsson-jv-2003",
      "url": "/tse/6758/decisions/sony-ericsson-jv-2003/",
      "api_url": "/api/6758/decisions/sony-ericsson-jv-2003.json",
      "year": 2003,
      "month": 1,
      "type": "alliance",
      "tags": [
        "gl-expansion",
        "tr-turnaround"
      ],
      "title": "エリクソンとの携帯電話合弁「ソニー・エリクソン」の設立と、赤字下の追加出資による事業継続",
      "subtitle": "「弱者連合」と評された日欧折半合弁を、撤退か追加出資かの岐路でどう立て直したか",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "sentaku-to-shuchu-2014",
      "url": "/tse/6758/decisions/sentaku-to-shuchu-2014/",
      "api_url": "/api/6758/decisions/sentaku-to-shuchu-2014.json",
      "year": 2014,
      "month": null,
      "type": "restructuring",
      "tags": [
        "pf-exit",
        "pf-focus",
        "tr-turnaround"
      ],
      "title": "平井一夫氏の選択と集中とVAIO・電池事業の譲渡",
      "subtitle": "何を伸ばすかより何を捨てるか——過去最大の赤字からの再建で、ソニーはどう事業を手放したか",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "third-point-breakup-defense",
      "url": "/tse/6758/decisions/third-point-breakup-defense/",
      "api_url": "/api/6758/decisions/third-point-breakup-defense.json",
      "year": 2019,
      "month": 9,
      "type": "shareholder_proposal",
      "tags": [
        "cp-activist"
      ],
      "title": "サードポイントの事業分離要求とソニーの統合堅持",
      "subtitle": "高収益の事業を切り離すべきか——コングロマリット・ディスカウントを説く物言う株主に、ソニーはなぜ二度とも分離を退けたか",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "sony-financial-subsidiary-2020",
      "url": "/tse/6758/decisions/sony-financial-subsidiary-2020/",
      "api_url": "/api/6758/decisions/sony-financial-subsidiary-2020.json",
      "year": 2020,
      "month": 5,
      "type": "acquisition",
      "tags": [
        "cp-delisting",
        "pf-diversify-related"
      ],
      "title": "金融事業ソニーフィナンシャルの完全子会社化（約4,000億円のTOB）",
      "subtitle": "物言う株主が迫る分離を退け、なぜ金融を切り離さず逆に取り込んだか——コングロマリットの資本再編",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "purpose-holding-company-2021",
      "url": "/tse/6758/decisions/purpose-holding-company-2021/",
      "api_url": "/api/6758/decisions/purpose-holding-company-2021.json",
      "year": 2021,
      "month": null,
      "type": "governance",
      "tags": [
        "cp-holdings",
        "pf-focus"
      ],
      "title": "吉田憲一郎氏のパーパス経営と純粋持株会社体制への移行",
      "subtitle": "創業者のカリスマに頼らず、多くの事業をどう束ねるか——ソニーを純利益1兆円企業へ導いた統治の作り替え",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "sony-honda-ev-jv-2022",
      "url": "/tse/6758/decisions/sony-honda-ev-jv-2022/",
      "api_url": "/api/6758/decisions/sony-honda-ev-jv-2022.json",
      "year": 2022,
      "month": 3,
      "type": "alliance",
      "tags": [
        "pf-diversify-related"
      ],
      "title": "ホンダとのEV合弁ソニー・ホンダモビリティ設立──スマホの次の成長軸としてのモビリティー参入",
      "subtitle": "完成車で自動車大手と張り合うのか、裏方の技術で稼ぐのか──「次の10年はモビリティー」をどう形にするか",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "financial-partial-spinoff-2025",
      "url": "/tse/6758/decisions/financial-partial-spinoff-2025/",
      "api_url": "/api/6758/decisions/financial-partial-spinoff-2025.json",
      "year": 2025,
      "month": 9,
      "type": "divestiture",
      "tags": [
        "cp-spinoff",
        "pf-exit"
      ],
      "title": "金融事業の一部分離・再上場（税制適格パーシャル・スピンオフ）",
      "subtitle": "46年前に始めた金融を、なぜ手放し、なぜ2割弱だけ残したか——コングロマリットの資本効率をめぐる選択",
      "status": "implemented",
      "status_label": "実施"
    }
  ],
  "by_type": [
    {
      "key": "acquisition",
      "count": 2,
      "url": "/api/6758/decisions/by-type/acquisition.json"
    },
    {
      "key": "alliance",
      "count": 2,
      "url": "/api/6758/decisions/by-type/alliance.json"
    },
    {
      "key": "divestiture",
      "count": 1,
      "url": "/api/6758/decisions/by-type/divestiture.json"
    },
    {
      "key": "founding",
      "count": 4,
      "url": "/api/6758/decisions/by-type/founding.json"
    },
    {
      "key": "governance",
      "count": 1,
      "url": "/api/6758/decisions/by-type/governance.json"
    },
    {
      "key": "restructuring",
      "count": 1,
      "url": "/api/6758/decisions/by-type/restructuring.json"
    },
    {
      "key": "shareholder_proposal",
      "count": 1,
      "url": "/api/6758/decisions/by-type/shareholder_proposal.json"
    }
  ],
  "by_decade": [
    {
      "key": "1940s",
      "count": 2,
      "url": "/api/6758/decisions/by-decade/1940s.json"
    },
    {
      "key": "1950s",
      "count": 1,
      "url": "/api/6758/decisions/by-decade/1950s.json"
    },
    {
      "key": "1980s",
      "count": 1,
      "url": "/api/6758/decisions/by-decade/1980s.json"
    },
    {
      "key": "1990s",
      "count": 1,
      "url": "/api/6758/decisions/by-decade/1990s.json"
    },
    {
      "key": "2000s",
      "count": 1,
      "url": "/api/6758/decisions/by-decade/2000s.json"
    },
    {
      "key": "2010s",
      "count": 2,
      "url": "/api/6758/decisions/by-decade/2010s.json"
    },
    {
      "key": "2020s",
      "count": 4,
      "url": "/api/6758/decisions/by-decade/2020s.json"
    }
  ]
}