{
  "spec_version": "3",
  "endpoint": "decisions",
  "stock_code": "9531",
  "company_name": "東京ガス",
  "content_lang": "ja",
  "meta_lang": "en",
  "canonical_url": "https://the-shashi.com/tse/9531/",
  "api_url": "/api/9531/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/9531/",
  "count": 6,
  "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": "gas-privatization-1885",
      "url": "/tse/9531/decisions/gas-privatization-1885/",
      "api_url": "/api/9531/decisions/gas-privatization-1885.json",
      "year": 1885,
      "month": 10,
      "type": "founding",
      "tags": [
        "tr-turnaround",
        "st-capex"
      ],
      "title": "東京府瓦斯局の払い下げ引き受けと東京瓦斯会社の創立",
      "subtitle": "赤字のまま安く受けるか、黒字にしてから受けるか——官営ガス事業の払い下げをめぐる四年",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "lng-import-1969",
      "url": "/tse/9531/decisions/lng-import-1969/",
      "api_url": "/api/9531/decisions/lng-import-1969.json",
      "year": 1969,
      "month": null,
      "type": "transformation",
      "tags": [
        "st-capex",
        "st-tech",
        "bm-core-shift"
      ],
      "title": "アラスカ産LNGの15年長期契約と東京電力との共同調達、根岸基地の建設",
      "subtitle": "単価の高い未知の燃料を、誰と分け合って引き取るか——公害対策が迫った原料転換と、競争相手への共同購入の申し入れ",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "heat-value-conversion-1972",
      "url": "/tse/9531/decisions/heat-value-conversion-1972/",
      "api_url": "/api/9531/decisions/heat-value-conversion-1972.json",
      "year": 1972,
      "month": 6,
      "type": "transformation",
      "tags": [
        "st-tech",
        "st-platform"
      ],
      "title": "供給熱量の11,000キロカロリーへの引き上げと、首都圏550万件のガス機器の自社調整",
      "subtitle": "機器の買い替えを客に求めるか、社員が一軒ずつ回るか——外部委託を退けた熱量変更の工程",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "power-retail-entry-2016",
      "url": "/tse/9531/decisions/power-retail-entry-2016/",
      "api_url": "/api/9531/decisions/power-retail-entry-2016.json",
      "year": 2016,
      "month": null,
      "type": "new_business",
      "tags": [
        "pf-diversify-related",
        "st-pricing",
        "bm-model-shift"
      ],
      "title": "電力小売全面自由化に合わせた家庭向け低圧電力販売への参入とガス・電気のセット販売",
      "subtitle": "開かれる市場を取りに行くのか、開かれる自陣を守るのか——ガス最大手が電気を売り始めた理由",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "rockcliff-acquisition-2023",
      "url": "/tse/9531/decisions/rockcliff-acquisition-2023/",
      "api_url": "/api/9531/decisions/rockcliff-acquisition-2023.json",
      "year": 2023,
      "month": 12,
      "type": "overseas",
      "tags": [
        "ma-crossborder-out",
        "pf-vertical",
        "gl-expansion"
      ],
      "title": "米国シェールガス開発・生産会社ロッククリフ・エナジーの全株式取得",
      "subtitle": "液化天然ガスの買い手にとどまるか、産ガス地の上流を自ら握るか——4,050億円の海外投資と、会社自身が示した海外ROA3.3％",
      "status": "implemented",
      "status_label": "実施"
    },
    {
      "slug": "elliott-tokyogas-realestate-2024",
      "url": "/tse/9531/decisions/elliott-tokyogas-realestate-2024/",
      "api_url": "/api/9531/decisions/elliott-tokyogas-realestate-2024.json",
      "year": 2024,
      "month": null,
      "type": "shareholder_proposal",
      "tags": [
        "cp-activist",
        "cp-finance"
      ],
      "title": "エリオットの5％取得と不動産売却要求への対応",
      "subtitle": "一等地の含み資産を株主に返すか、都市インフラの緩衝材として持ち続けるか——物言う株主が突いた資本効率をめぐる攻防",
      "status": "proposed",
      "status_label": "進行中"
    }
  ],
  "by_type": [
    {
      "key": "founding",
      "count": 1,
      "url": "/api/9531/decisions/by-type/founding.json"
    },
    {
      "key": "new_business",
      "count": 1,
      "url": "/api/9531/decisions/by-type/new_business.json"
    },
    {
      "key": "overseas",
      "count": 1,
      "url": "/api/9531/decisions/by-type/overseas.json"
    },
    {
      "key": "shareholder_proposal",
      "count": 1,
      "url": "/api/9531/decisions/by-type/shareholder_proposal.json"
    },
    {
      "key": "transformation",
      "count": 2,
      "url": "/api/9531/decisions/by-type/transformation.json"
    }
  ],
  "by_decade": [
    {
      "key": "1880s",
      "count": 1,
      "url": "/api/9531/decisions/by-decade/1880s.json"
    },
    {
      "key": "1960s",
      "count": 1,
      "url": "/api/9531/decisions/by-decade/1960s.json"
    },
    {
      "key": "1970s",
      "count": 1,
      "url": "/api/9531/decisions/by-decade/1970s.json"
    },
    {
      "key": "2010s",
      "count": 1,
      "url": "/api/9531/decisions/by-decade/2010s.json"
    },
    {
      "key": "2020s",
      "count": 2,
      "url": "/api/9531/decisions/by-decade/2020s.json"
    }
  ]
}