{ "spec_version": "5", "endpoint": "history", "stock_code": "4628", "company_name": "エスケー化研", "content_lang": "ja", "meta_lang": "en", "canonical_url": "https://the-shashi.com/tse/4628/decisions/", "api_url": "/api/4628/history.json", "updated": "2026-10-13", "license": "© 2026 Yutaka Sugiura. All rights reserved.", "attribution": "The社史 (the-shashi.com) — https://the-shashi.com/tse/4628/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": "エスケー化研の歴史概略", "eras": [ { "title": "藤井實の四国化学研究所創業と四国化研工業への改称", "start_year": 1955, "end_year": 1971, "phase": "founding" }, { "title": "外装用吹付タイルの開発と得意先永大産業の倒産", "start_year": 1972, "end_year": 1992, "phase": "growth" }, { "title": "下地補修材の剥離事故と店頭登録", "start_year": 1993, "end_year": 2009, "phase": "scandal" }, { "title": "タイ・インドネシアへの展開と藤井実広の社長就任", "start_year": 2010, "end_year": 2026, "phase": "stable_growth" } ], "lineage": { "path": "4628-lineage-top.v3.json" }, "timelineLead": "1955年に藤井實氏が創業した四国化学研究所が起源。\n1972年に外装用吹付タイルを開発し、1984年にセラミック系耐火被覆材の製造販売を始めた。建築仕上材と耐火材を主力とするメーカーで、マレーシア・中国・タイ・インドネシアにも拠点を設ける。", "lineageLead": "藤井實氏が1955年に創業した四国化学研究所が前身である。\n1958年に株式会社へ改組し、1963年に四国化研工業、1991年にエスケー化研へ商号を変更した。1972年に外装用吹付タイルを開発し、1984年に耐火被覆材へ参入している。外壁の塗材を軸に、防耐火材へ製品領域を広げた専業メーカーである。", "long_term": [ { "year": 1994, "month": 3, "company_name": "エスケー化研", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": null, "sales": null, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": null, "ordinary_profit": null, "net_profit_jp": null, "net_profit": null, "net_margin": null, "employees": null, "reference": null }, { "year": 1995, "month": 3, "company_name": "エスケー化研", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": null, "sales": null, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": null, "ordinary_profit": null, "net_profit_jp": null, "net_profit": null, "net_margin": null, "employees": null, "reference": null }, { "year": 1996, "month": 3, "company_name": "エスケー化研", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": null, "sales": null, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": null, "ordinary_profit": null, "net_profit_jp": null, "net_profit": null, "net_margin": null, "employees": null, "reference": null }, { "year": 1997, "month": 3, "company_name": "エスケー化研", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": null, "sales": null, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": null, "ordinary_profit": null, "net_profit_jp": null, "net_profit": null, "net_margin": null, "employees": null, "reference": null }, { "year": 1998, "month": 3, "company_name": "エスケー化研", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": null, "sales": null, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": null, "ordinary_profit": null, "net_profit_jp": null, "net_profit": null, "net_margin": null, "employees": null, "reference": null }, { "year": 1999, "month": 3, "company_name": "エスケー化研", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": null, "sales": null, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": null, "ordinary_profit": null, "net_profit_jp": null, "net_profit": null, "net_margin": null, "employees": null, "reference": null }, { "year": 2000, "month": 3, "company_name": "エスケー化研", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": null, "sales": null, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": null, "ordinary_profit": null, "net_profit_jp": null, "net_profit": null, "net_margin": null, "employees": null, "reference": null }, { "year": 2001, "month": 3, "company_name": "エスケー化研", "consolidation": "単体", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": null, "sales": null, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": null, "ordinary_profit": null, "net_profit_jp": null, "net_profit": null, "net_margin": null, "employees": null, "reference": null }, { "year": 2002, "month": 3, "company_name": "エスケー化研", "consolidation": "連結", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 393, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": "経常利益", "ordinary_profit": 48, "net_profit_jp": "当期純利益", "net_profit": 32, "net_margin": 8.142, "employees": null, "reference": null }, { "year": 2003, "month": 3, "company_name": "エスケー化研", "consolidation": "連結", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 417, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": "経常利益", "ordinary_profit": 53, "net_profit_jp": "当期純利益", "net_profit": 29, "net_margin": 6.954, "employees": null, "reference": null }, { "year": 2004, "month": 3, "company_name": "エスケー化研", "consolidation": "連結", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 450, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": "経常利益", "ordinary_profit": 59, "net_profit_jp": "当期純利益", "net_profit": 34, "net_margin": 7.555, "employees": null, "reference": null }, { "year": 2005, "month": 3, "company_name": "エスケー化研", "consolidation": "連結", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 463, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": "経常利益", "ordinary_profit": 64, "net_profit_jp": "当期純利益", "net_profit": 38, "net_margin": 8.207, "employees": null, "reference": null }, { "year": 2006, "month": 3, "company_name": "エスケー化研", "consolidation": "連結", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 501, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": "経常利益", "ordinary_profit": 63, "net_profit_jp": "当期純利益", "net_profit": 38, "net_margin": 7.584, "employees": null, "reference": null }, { "year": 2007, "month": 3, "company_name": "エスケー化研", "consolidation": "連結", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 572, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": "経常利益", "ordinary_profit": 72, "net_profit_jp": "当期純利益", "net_profit": 50, "net_margin": 8.741, "employees": null, "reference": null }, { "year": 2008, "month": 3, "company_name": "エスケー化研", "consolidation": "連結", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 601, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": "経常利益", "ordinary_profit": 63, "net_profit_jp": "当期純利益", "net_profit": 38, "net_margin": 6.322, "employees": null, "reference": null }, { "year": 2009, "month": 3, "company_name": "エスケー化研", "consolidation": "連結", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 625, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": "経常利益", "ordinary_profit": 59, "net_profit_jp": "当期純利益", "net_profit": 35, "net_margin": 5.6, "employees": null, "reference": null }, { "year": 2010, "month": 3, "company_name": "エスケー化研", "consolidation": "連結", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 629, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": "経常利益", "ordinary_profit": 75, "net_profit_jp": "当期純利益", "net_profit": 45, "net_margin": 7.154, "employees": null, "reference": null }, { "year": 2011, "month": 3, "company_name": "エスケー化研", "consolidation": "連結", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 711, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": "経常利益", "ordinary_profit": 89, "net_profit_jp": "当期純利益", "net_profit": 54, "net_margin": 7.594, "employees": null, "reference": null }, { "year": 2012, "month": 3, "company_name": "エスケー化研", "consolidation": "連結", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 783, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": "経常利益", "ordinary_profit": 102, "net_profit_jp": "親会社株主に帰属する当期純利益", "net_profit": 59, "net_margin": 7.535, "employees": 1782, "reference": null }, { "year": 2013, "month": 3, "company_name": "エスケー化研", "consolidation": "連結", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 829, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": "経常利益", "ordinary_profit": 122, "net_profit_jp": "親会社株主に帰属する当期純利益", "net_profit": 76, "net_margin": 9.167, "employees": 1948, "reference": null }, { "year": 2014, "month": 3, "company_name": "エスケー化研", "consolidation": "連結", "accounting_standard": "JGAAP", "unit": "億円", "sales_jp": "売上高", "sales": 949, "operating_profit_jp": null, "operating_profit": null, "ordinary_profit_jp": "経常利益", "ordinary_profit": 145, "net_profit_jp": "親会社株主に帰属する当期純利益", "net_profit": 91, "net_margin": 9.589, "employees": 2035, "reference": null }, { "year": 2015, "month": 3, "company_name": 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