{
  "spec_version": "3",
  "endpoint": "decisions",
  "stock_code": "4205",
  "company_name": "日本ゼオン",
  "content_lang": "ja",
  "meta_lang": "en",
  "canonical_url": "https://the-shashi.com/tse/4205/",
  "api_url": "/api/4205/decisions.json",
  "updated": "2026-08-12",
  "license": "© 2026 Yutaka Sugiura. All rights reserved.",
  "attribution": "The社史 (the-shashi.com) — https://the-shashi.com/tse/4205/",
  "count": 3,
  "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": "goodrich-joint-venture-1950",
      "url": "/tse/4205/decisions/goodrich-joint-venture-1950/",
      "api_url": "/api/4205/decisions/goodrich-joint-venture-1950.json",
      "year": 1950,
      "month": 4,
      "type": "founding",
      "tags": [
        "st-tech",
        "st-capex",
        "cp-crossholding"
      ],
      "title": "B.F.グッドリッチ・ケミカルとの合弁による日本ゼオンの設立と塩化ビニル樹脂の国産化",
      "subtitle": "自前の技術で育てるか、外国技術を丸ごと買うか——塩ビ18社の反対を押しての合弁",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "special-rubber-acquisitions-1989",
      "url": "/tse/4205/decisions/special-rubber-acquisitions-1989/",
      "api_url": "/api/4205/decisions/special-rubber-acquisitions-1989.json",
      "year": 1989,
      "month": 3,
      "type": "acquisition",
      "tags": [
        "ma-crossborder-out",
        "gl-entry",
        "pf-focus",
        "st-tech"
      ],
      "title": "英BPケミカルズと米B.F.グッドリッチの特殊ゴム部門の取得、日米欧3極生産体制の構築",
      "subtitle": "汎用品で戦うか、小さな市場に特化して世界を取るか——ダンピング提訴で輸出を絶たれた米国への再進出",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "pvc-exit-2000",
      "url": "/tse/4205/decisions/pvc-exit-2000/",
      "api_url": "/api/4205/decisions/pvc-exit-2000.json",
      "year": 2000,
      "month": null,
      "type": "divestiture",
      "tags": [
        "pf-exit",
        "bm-core-shift",
        "ma-merger"
      ],
      "title": "塩化ビニル事業の新第一塩ビへの移管と、水島工場での生産打ち切りによる祖業からの撤退",
      "subtitle": "社名の由来となった祖業を、いつ、どの順序で手放すか——設備過剰が解けない業界での離脱",
      "status": "implemented",
      "status_label": "実施"
    }
  ],
  "by_type": [
    {
      "key": "acquisition",
      "count": 1,
      "url": "/api/4205/decisions/by-type/acquisition.json"
    },
    {
      "key": "divestiture",
      "count": 1,
      "url": "/api/4205/decisions/by-type/divestiture.json"
    },
    {
      "key": "founding",
      "count": 1,
      "url": "/api/4205/decisions/by-type/founding.json"
    }
  ],
  "by_decade": [
    {
      "key": "1950s",
      "count": 1,
      "url": "/api/4205/decisions/by-decade/1950s.json"
    },
    {
      "key": "1980s",
      "count": 1,
      "url": "/api/4205/decisions/by-decade/1980s.json"
    },
    {
      "key": "2000s",
      "count": 1,
      "url": "/api/4205/decisions/by-decade/2000s.json"
    }
  ]
}