{
  "spec_version": "3",
  "endpoint": "decisions",
  "stock_code": "9831",
  "company_name": "ヤマダホールディングス",
  "content_lang": "ja",
  "meta_lang": "en",
  "canonical_url": "https://the-shashi.com/tse/9831/",
  "api_url": "/api/9831/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/9831/",
  "count": 5,
  "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": "yamada-model-1984",
      "url": "/tse/9831/decisions/yamada-model-1984/",
      "api_url": "/api/9831/decisions/yamada-model-1984.json",
      "year": 1984,
      "month": 3,
      "type": "transformation",
      "tags": [
        "bm-channel",
        "st-lowcost"
      ],
      "title": "「ヤマダモデル」の確立とメーカー系列との対決",
      "subtitle": "系列に縛られない混売店は、メーカーの流通秩序をどう覆して安売りの首位へ届いたか",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "home-business-2011",
      "url": "/tse/9831/decisions/home-business-2011/",
      "api_url": "/api/9831/decisions/home-business-2011.json",
      "year": 2011,
      "month": 8,
      "type": "new_business",
      "tags": [
        "pf-diversify-related"
      ],
      "title": "住宅事業への参入と「くらしまるごと」への多角化",
      "subtitle": "家電単品市場の頭打ちに、ヤマダは店舗網と顧客基盤という財産をどこへ向けたか",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "restructuring-2015",
      "url": "/tse/9831/decisions/restructuring-2015/",
      "api_url": "/api/9831/decisions/restructuring-2015.json",
      "year": 2015,
      "month": 5,
      "type": "restructuring",
      "tags": [
        "tr-restructuring",
        "gv-talent"
      ],
      "title": "46店の一斉閉店と構造改革",
      "subtitle": "郊外の安売りモデルが都市と低成長でつまずいたとき、ヤマダは店舗網と同族経営をどう作り替えたか",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "otsuka-kagu-subsidiary-2021",
      "url": "/tse/9831/decisions/otsuka-kagu-subsidiary-2021/",
      "api_url": "/api/9831/decisions/otsuka-kagu-subsidiary-2021.json",
      "year": 2021,
      "month": 6,
      "type": "acquisition",
      "tags": [
        "ma-rescue",
        "tr-turnaround"
      ],
      "title": "大塚家具の完全子会社化——父娘騒動で疲弊した名門家具の救済と取り込み",
      "subtitle": "独立を尊重して迎えた名門を、家電量販はなぜ1年半で完全に抱え込んだか",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "edion-integration-2026",
      "url": "/tse/9831/decisions/edion-integration-2026/",
      "api_url": "/api/9831/decisions/edion-integration-2026.json",
      "year": 2026,
      "month": 6,
      "type": "acquisition",
      "tags": [
        "ma-merger",
        "cp-holdings"
      ],
      "title": "エディオンとの経営統合による家電量販首位連合",
      "subtitle": "市場が縮む家電量販で、業界首位のヤマダはなぜ5位のエディオンと組む道を選んだか",
      "status": "proposed",
      "status_label": "進行中"
    }
  ],
  "by_type": [
    {
      "key": "acquisition",
      "count": 2,
      "url": "/api/9831/decisions/by-type/acquisition.json"
    },
    {
      "key": "new_business",
      "count": 1,
      "url": "/api/9831/decisions/by-type/new_business.json"
    },
    {
      "key": "restructuring",
      "count": 1,
      "url": "/api/9831/decisions/by-type/restructuring.json"
    },
    {
      "key": "transformation",
      "count": 1,
      "url": "/api/9831/decisions/by-type/transformation.json"
    }
  ],
  "by_decade": [
    {
      "key": "1980s",
      "count": 1,
      "url": "/api/9831/decisions/by-decade/1980s.json"
    },
    {
      "key": "2010s",
      "count": 2,
      "url": "/api/9831/decisions/by-decade/2010s.json"
    },
    {
      "key": "2020s",
      "count": 2,
      "url": "/api/9831/decisions/by-decade/2020s.json"
    }
  ]
}