{ "spec_version": "5", "endpoint": "history", "stock_code": "1815", "company_name": "鉄建建設", "content_lang": "ja", "meta_lang": "en", "canonical_url": "https://the-shashi.com/tse/1815/decisions/", "api_url": "/api/1815/history.json", "updated": "2026-10-27", "license": "© 2026 Yutaka Sugiura. All rights reserved.", "attribution": "The社史 (the-shashi.com) — https://the-shashi.com/tse/1815/decisions/", "source": { "long_term": { "primary": [ "有価証券報告書" ], "extraction": "EDINET の XBRL、旧有価証券報告書、会社年鑑・社史等からの転記", "row_field": "reference", "caveat": "創業期から現在までを 1 本に繋いだ長期系列のため、年代により出所・単位・連結範囲が変わる。行ごとの reference / unit / consolidation を必ず参照すること" } }, "title": "鉄建建設の歴史概略", "eras": [ { "title": "鉄道建設興業の設立と東証一部への指定替え", "start_year": 1944, "end_year": 1963, "phase": "founding" }, { "title": "鉄建建設への商号変更と全国支店網の構築", "start_year": 1964, "end_year": 1996, "phase": "growth" }, { "title": "海外統括支店の開設とゴルフ場子会社の売却", "start_year": 1997, "end_year": 2017, "phase": "maturity" }, { "title": "インド高速鉄道の準備室設置と鉄建プロパティーズの設立", "start_year": 2018, "end_year": 2026, "phase": "maturity" } ], "long_term": [ { "year": 1950, "month": 3, "company_name": "1815", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": null, "sales": null, "operating_profit_jp": null, "operating_profit": null, 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