{
  "spec_version": "3",
  "endpoint": "decisions",
  "stock_code": "4042",
  "company_name": "東ソー",
  "content_lang": "ja",
  "meta_lang": "en",
  "canonical_url": "https://the-shashi.com/tse/4042/",
  "api_url": "/api/4042/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/4042/",
  "count": 2,
  "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": "petrochemical-boom-bust-1991",
      "url": "/tse/4042/decisions/petrochemical-boom-bust-1991/",
      "api_url": "/api/4042/decisions/petrochemical-boom-bust-1991.json",
      "year": 1991,
      "month": 1,
      "type": "strategy",
      "tags": [
        "st-capex",
        "tr-restructuring",
        "pf-focus"
      ],
      "title": "バブルをまたいだ石油化学の強気拡張と反動——エチレン増設・10事業撤退・塩ビ選別再投資",
      "subtitle": "総合化学への一貫体制を築いた強気の設備投資は、なぜ2年で撤退へ転じ、塩ビへの選別再投資に行き着いたか",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "chlor-alkali-vinyl-survival-2017",
      "url": "/tse/4042/decisions/chlor-alkali-vinyl-survival-2017/",
      "api_url": "/api/4042/decisions/chlor-alkali-vinyl-survival-2017.json",
      "year": 2017,
      "month": 4,
      "type": "strategy",
      "tags": [
        "pf-focus",
        "st-tech"
      ],
      "title": "汎用の塩ビ・クロールアルカリ基盤事業を捨てず磨き切る「死守と復活」戦略",
      "subtitle": "アジア勢が縮小・撤退する汎用素材を、東ソーはなぜ手放さなかったのか",
      "status": "implemented",
      "status_label": "実施"
    }
  ],
  "by_type": [
    {
      "key": "strategy",
      "count": 2,
      "url": "/api/4042/decisions/by-type/strategy.json"
    }
  ],
  "by_decade": [
    {
      "key": "1990s",
      "count": 1,
      "url": "/api/4042/decisions/by-decade/1990s.json"
    },
    {
      "key": "2010s",
      "count": 1,
      "url": "/api/4042/decisions/by-decade/2010s.json"
    }
  ]
}