{
  "spec_version": "3",
  "endpoint": "decisions",
  "stock_code": "3436",
  "company_name": "SUMCO",
  "content_lang": "ja",
  "meta_lang": "en",
  "canonical_url": "https://the-shashi.com/tse/3436/",
  "api_url": "/api/3436/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/3436/",
  "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": "silicon-wafer-integration-2002",
      "url": "/tse/3436/decisions/silicon-wafer-integration-2002/",
      "api_url": "/api/3436/decisions/silicon-wafer-integration-2002.json",
      "year": 2002,
      "month": 2,
      "type": "merger",
      "tags": [
        "ma-merger",
        "st-capex",
        "st-tech"
      ],
      "title": "住友・三菱のシリコンウェーハ事業の統合と300mm専業会社の設立",
      "subtitle": "単独では負えなくなった300mm投資を、住友金属工業と三菱マテリアルはなぜ折半出資の一社に託したか",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "sumco-rebranding-and-tse-listing-2005",
      "url": "/tse/3436/decisions/sumco-rebranding-and-tse-listing-2005/",
      "api_url": "/api/3436/decisions/sumco-rebranding-and-tse-listing-2005.json",
      "year": 2005,
      "month": 8,
      "type": "capital",
      "tags": [
        "cp-listing",
        "cp-finance",
        "ma-pmi"
      ],
      "title": "三菱住友シリコンからSUMCOへの商号統一と東証一部への上場",
      "subtitle": "親会社2社の増資と欠損てん補に支えられてきた会社が、統合から3年余で自ら資本市場へ出たのはなぜか",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "business-recovery-plan-2012",
      "url": "/tse/3436/decisions/business-recovery-plan-2012/",
      "api_url": "/api/3436/decisions/business-recovery-plan-2012.json",
      "year": 2012,
      "month": 2,
      "type": "restructuring",
      "tags": [
        "tr-restructuring",
        "pf-exit"
      ],
      "title": "事業再生計画による尼崎・生野工場の閉鎖と太陽電池向けシリコンウェーハ事業からの撤退",
      "subtitle": "住友系発祥の拠点まで畳む再建策で、赤字に沈んだシリコンウェーハ大手は何を残そうとしたか",
      "status": "implemented",
      "status_label": "実施"
    }
  ],
  "by_type": [
    {
      "key": "capital",
      "count": 1,
      "url": "/api/3436/decisions/by-type/capital.json"
    },
    {
      "key": "merger",
      "count": 1,
      "url": "/api/3436/decisions/by-type/merger.json"
    },
    {
      "key": "restructuring",
      "count": 1,
      "url": "/api/3436/decisions/by-type/restructuring.json"
    }
  ],
  "by_decade": [
    {
      "key": "2000s",
      "count": 2,
      "url": "/api/3436/decisions/by-decade/2000s.json"
    },
    {
      "key": "2010s",
      "count": 1,
      "url": "/api/3436/decisions/by-decade/2010s.json"
    }
  ]
}