{
  "spec_version": "3",
  "endpoint": "decisions",
  "stock_code": "5801",
  "company_name": "古河電工",
  "content_lang": "ja",
  "meta_lang": "en",
  "canonical_url": "https://the-shashi.com/tse/5801/",
  "api_url": "/api/5801/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/5801/",
  "count": 4,
  "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-1896",
      "url": "/tse/5801/decisions/founding-1896/",
      "api_url": "/api/5801/decisions/founding-1896.json",
      "year": 1896,
      "month": 6,
      "type": "founding",
      "title": "古河電工創業——足尾銅山の電気銅から横浜の電線工場へ",
      "subtitle": "電灯・通信網の拡大で銅線需要が高まるなか、足尾銅山を握る古河市兵衛氏は銅の加工先をどう社内に取り込んだか",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "siemens-alliance-1923",
      "url": "/tse/5801/decisions/siemens-alliance-1923/",
      "api_url": "/api/5801/decisions/siemens-alliance-1923.json",
      "year": 1923,
      "month": null,
      "type": "alliance",
      "tags": [
        "pf-diversify-related",
        "st-tech",
        "cp-crossholding"
      ],
      "title": "ドイツ・シーメンスとの資本・技術提携による富士電機製造の設立",
      "subtitle": "電線までしか持たない会社が重電機へ伸びるとき、自社の事業部と外資との合弁のどちらを選ぶか",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "ofs-acquisition-2001",
      "url": "/tse/5801/decisions/ofs-acquisition-2001/",
      "api_url": "/api/5801/decisions/ofs-acquisition-2001.json",
      "year": 2001,
      "month": 7,
      "type": "acquisition",
      "tags": [
        "ma-crossborder-out",
        "bm-core-shift",
        "st-tech"
      ],
      "title": "米ルーセントの光ファイバ・ケーブル部門の買収と、世界シェア2位の取得",
      "subtitle": "銅線から光へ移るために、古河潤之助氏は株式の含み益をどこまで賭け金にしたか",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "core-focus-divestiture-2025",
      "url": "/tse/5801/decisions/core-focus-divestiture-2025/",
      "api_url": "/api/5801/decisions/core-focus-divestiture-2025.json",
      "year": 2025,
      "month": null,
      "type": "divestiture",
      "tags": [
        "pf-focus",
        "pf-exit",
        "cp-delisting"
      ],
      "title": "銅管・巻線・TOTOKU・UACJ・古河電池の売却と、データセンター向け光事業への集中投資",
      "subtitle": "資本効率を指標に据えた会社は、財閥時代から抱えた系列子会社をどこまで手放したか",
      "status": "implemented",
      "status_label": "実施"
    }
  ],
  "by_type": [
    {
      "key": "acquisition",
      "count": 1,
      "url": "/api/5801/decisions/by-type/acquisition.json"
    },
    {
      "key": "alliance",
      "count": 1,
      "url": "/api/5801/decisions/by-type/alliance.json"
    },
    {
      "key": "divestiture",
      "count": 1,
      "url": "/api/5801/decisions/by-type/divestiture.json"
    },
    {
      "key": "founding",
      "count": 1,
      "url": "/api/5801/decisions/by-type/founding.json"
    }
  ],
  "by_decade": [
    {
      "key": "1890s",
      "count": 1,
      "url": "/api/5801/decisions/by-decade/1890s.json"
    },
    {
      "key": "1920s",
      "count": 1,
      "url": "/api/5801/decisions/by-decade/1920s.json"
    },
    {
      "key": "2000s",
      "count": 1,
      "url": "/api/5801/decisions/by-decade/2000s.json"
    },
    {
      "key": "2020s",
      "count": 1,
      "url": "/api/5801/decisions/by-decade/2020s.json"
    }
  ]
}