{ "spec_version": "3", "endpoint": "decisions", "stock_code": "9005", "company_name": "東急", "content_lang": "ja", "meta_lang": "en", "canonical_url": "https://the-shashi.com/tse/9005/", "api_url": "/api/9005/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/9005/", "count": 10, "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": "railway-and-land-model-1922", "url": "/tse/9005/decisions/railway-and-land-model-1922/", "api_url": "/api/9005/decisions/railway-and-land-model-1922.json", "year": 1922, "month": 9, "type": "founding", "tags": [ "pf-diversify-related" ], "title": "目黒蒲田電鉄の創業と「鉄道と沿線開発を一体で回す」経営モデルの確立", "subtitle": "鉄道単独では採算の立たない郊外電鉄を、五島慶太専務はどのように土地・住宅・鉄道の一体で成り立たせようとしたか", "status": "implemented", "status_label": "実施" }, { "slug": "dai-tokyu-1942", "url": "/tse/9005/decisions/dai-tokyu-1942/", "api_url": "/api/9005/decisions/dai-tokyu-1942.json", "year": 1942, "month": 5, "type": "reorganization", "tags": [ "ma-merger", "cp-spinoff", "tr-crisis" ], "title": "戦時交通統合による「大東急」の形成と戦後の解体", "subtitle": "戦時の国策が一社へ束ねた関東の私鉄は、なぜ6年で解かれ、今日の東急・小田急・京急・京王の地図をどう定めたか", "status": "implemented", "status_label": "実施" }, { "slug": "tama-garden-city-1966", "url": "/tse/9005/decisions/tama-garden-city-1966/", "api_url": "/api/9005/decisions/tama-garden-city-1966.json", "year": 1966, "month": 4, "type": "transformation", "tags": [ "st-capex", "pf-diversify-related" ], "title": "鉄道と沿線開発を一体で回す多摩田園都市の建設", "subtitle": "鉄道単独では赤字を覚悟した東急は、55地区3,204haの区画整理と田園都市線でどう「土地・住宅・電車」の三層で稼ぐ構造を築いたか", "status": "implemented", "status_label": "実施" }, { "slug": "goto-noboru-diversification-1970s", "url": "/tse/9005/decisions/goto-noboru-diversification-1970s/", "api_url": "/api/9005/decisions/goto-noboru-diversification-1970s.json", "year": 1968, "month": 5, "type": "new_business", "tags": [ "pf-diversify-unrelated" ], "title": "五島昇社長による多角化——流通・ホテル・観光・航空への事業拡張", "subtitle": "多摩田園都市で得た開発力と資金を元手に、東急はどこまで事業を広げ「上場13社」の企業集団を築いたか", "status": "implemented", "status_label": "実施" }, { "slug": "shin-tamagawa-line-1977", "url": "/tse/9005/decisions/shin-tamagawa-line-1977/", "api_url": "/api/9005/decisions/shin-tamagawa-line-1977.json", "year": 1977, "month": 4, "type": "strategy", "tags": [ "st-capex" ], "title": "路面電車・玉川線に代わる地下新線「新玉川線」の建設と都心直通ネットワークの完成", "subtitle": "「会社の前途を考えれば軽々には踏み切れない」——多摩田園都市の乗客を都心へ運ぶ巨額の鉄道投資に、東急はどう踏み切ったか", "status": "implemented", "status_label": "実施" }, { "slug": "post-goto-group-restructuring-1990s", "url": "/tse/9005/decisions/post-goto-group-restructuring-1990s/", "api_url": "/api/9005/decisions/post-goto-group-restructuring-1990s.json", "year": 1995, "month": 3, "type": "restructuring", "tags": [ "tr-restructuring", "pf-focus", "gv-family" ], "title": "五島家の個人支配の終焉と、バブル期に膨らんだ非中核事業の整理", "subtitle": "五島昇会長の死後、遠心力の働く362社のグループを、横田二郎社長は集団指導体制でどう立て直そうとしたか", "status": "implemented", "status_label": "実施" }, { "slug": "tokyu-department-store-turnaround-1996", "url": "/tse/9005/decisions/tokyu-department-store-turnaround-1996/", "api_url": "/api/9005/decisions/tokyu-department-store-turnaround-1996.json", "year": 1996, "month": null, "type": "restructuring", "tags": [ "tr-turnaround", "gv-talent", "pf-focus" ], "title": "東急百貨店の本業回帰による再建 — 財テク破綻から「自分で仕入れ、自分で売れ」へ", "subtitle": "財テクに溺れた中核子会社を、現場主義の内山徹社長はどう小売業の基本へ引き戻したか", "status": "implemented", "status_label": "実施" }, { "slug": "aviation-entry-exit-2002", "url": "/tse/9005/decisions/aviation-entry-exit-2002/", "api_url": "/api/9005/decisions/aviation-entry-exit-2002.json", "year": 2002, "month": 10, "type": "divestiture", "tags": [ "pf-exit", "pf-focus" ], "title": "航空事業への参入と撤退——東亜国内航空への出資から日本エアシステムの統合まで", "subtitle": "鉄道会社の東急はなぜ空へ乗り出し、なぜ約30年で退いたか——多角化の理想と資本の現実", "status": "implemented", "status_label": "実施" }, { "slug": "shibuya-redevelopment-2010s", "url": "/tse/9005/decisions/shibuya-redevelopment-2010s/", "api_url": "/api/9005/decisions/shibuya-redevelopment-2010s.json", "year": 2012, "month": 4, "type": "strategy", "tags": [ "st-capex", "pf-focus" ], "title": "鉄道の地下化で生んだ跡地への集中投資による渋谷ターミナルの再開発", "subtitle": "東横線と田園都市線を都心へ潜らせた東急は、地上に空いた軌道跡と駅街区をどうオフィス・商業の中核資産へ作り替えたか", "status": "implemented", "status_label": "実施" }, { "slug": "holding-company-rail-spinoff-2019", "url": "/tse/9005/decisions/holding-company-rail-spinoff-2019/", "api_url": "/api/9005/decisions/holding-company-rail-spinoff-2019.json", "year": 2019, "month": 9, "type": "reorganization", "tags": [ "cp-holdings", "cp-spinoff" ], "title": "商号を東急に変え、鉄軌道業を東急電鉄へ会社分割した持株会社体制への移行", "subtitle": "髙橋和夫社長は、なぜ約100年掲げた「電鉄」を社名から外し、鉄道を本体から切り離したか", "status": "implemented", "status_label": "実施" } ], "by_type": [ { "key": "divestiture", "count": 1, "url": "/api/9005/decisions/by-type/divestiture.json" }, { "key": "founding", "count": 1, "url": "/api/9005/decisions/by-type/founding.json" }, { "key": "new_business", "count": 1, "url": "/api/9005/decisions/by-type/new_business.json" }, { "key": "reorganization", "count": 2, "url": "/api/9005/decisions/by-type/reorganization.json" }, { "key": "restructuring", "count": 2, "url": "/api/9005/decisions/by-type/restructuring.json" }, { "key": "strategy", "count": 2, "url": "/api/9005/decisions/by-type/strategy.json" }, { "key": "transformation", "count": 1, "url": "/api/9005/decisions/by-type/transformation.json" } ], "by_decade": [ { "key": "1920s", "count": 1, "url": "/api/9005/decisions/by-decade/1920s.json" }, { "key": "1940s", "count": 1, "url": "/api/9005/decisions/by-decade/1940s.json" }, { "key": "1960s", "count": 2, "url": "/api/9005/decisions/by-decade/1960s.json" }, { "key": "1970s", "count": 1, "url": "/api/9005/decisions/by-decade/1970s.json" }, { "key": "1990s", "count": 2, "url": "/api/9005/decisions/by-decade/1990s.json" }, { "key": "2000s", "count": 1, "url": "/api/9005/decisions/by-decade/2000s.json" }, { "key": "2010s", "count": 2, "url": "/api/9005/decisions/by-decade/2010s.json" } ] }