{
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  "endpoint": "timeline",
  "stock_code": "4951",
  "company_name": "エステー",
  "content_lang": "ja",
  "meta_lang": "en",
  "canonical_url": "https://the-shashi.com/tse/4951/",
  "api_url": "/api/4951/timeline.json",
  "updated": "2026-09-06",
  "license": "© 2026 Yutaka Sugiura. All rights reserved.",
  "attribution": "The社史 (the-shashi.com) — https://the-shashi.com/tse/4951/",
  "source": {
    "primary": [
      "有価証券報告書"
    ],
    "extraction": "有価証券報告書の沿革を基礎に、社史・報道で補完",
    "row_field": "source"
  },
  "timeline": [
    {
      "date": "1946/8",
      "importance": 3,
      "event": "防虫剤の製造販売を目的にエステー化学工業所を創立",
      "source": "有価証券報告書"
    },
    {
      "date": "1948/8",
      "importance": 2,
      "event": "エステー化学工業を東京都渋谷区に設立",
      "source": "有価証券報告書"
    },
    {
      "date": "1952/7",
      "importance": 1,
      "event": "本社を東京都新宿区に移転",
      "source": "有価証券報告書"
    },
    {
      "date": "1964/7",
      "importance": 2,
      "event": "埼玉工場で手袋等の製造を開始",
      "source": "有価証券報告書"
    },
    {
      "date": "1967/12",
      "importance": 1,
      "event": "小倉に防虫剤の生産子会社を設立",
      "source": "有価証券報告書"
    },
    {
      "date": "1974/1",
      "importance": 3,
      "event": "いわき工場で芳香剤等の製造販売を開始",
      "source": "有価証券報告書"
    },
    {
      "date": "1982/1",
      "importance": 2,
      "event": "エステー化学に商号変更",
      "source": "有価証券報告書"
    },
    {
      "date": "1984/1",
      "importance": 1,
      "event": "日本証券業協会東京地区協会に店頭登録",
      "source": "有価証券報告書"
    },
    {
      "date": "1986/4",
      "importance": 1,
      "event": "東京証券取引所市場第二部に上場",
      "source": "有価証券報告書"
    },
    {
      "date": "1988/4",
      "importance": 1,
      "event": "タイで手袋の製造販売を開始",
      "source": "有価証券報告書"
    },
    {
      "date": "1988/7",
      "importance": 1,
      "event": "台湾で手袋等の製造販売を開始",
      "source": "有価証券報告書"
    },
    {
      "date": "1988/12",
      "importance": 1,
      "event": "門司工場で芳香剤等の製造を開始",
      "source": "有価証券報告書"
    },
    {
      "date": "1989/1",
      "importance": 2,
      "event": "米国のエクセルプロダクツを買収",
      "source": "有価証券報告書"
    },
    {
      "date": "1991/12",
      "importance": 1,
      "event": "東京証券取引所市場第一部銘柄に指定",
      "source": "有価証券報告書"
    },
    {
      "date": "1992/2",
      "importance": 1,
      "event": "平田工場で防虫剤・芳香剤等の製造を開始",
      "source": "有価証券報告書"
    },
    {
      "date": "1994/1",
      "importance": 2,
      "event": "エクセルプロダクツを売却",
      "source": "有価証券報告書"
    },
    {
      "date": "1995/7",
      "importance": 1,
      "event": "小倉・門司両工場を九州工場に統合",
      "source": "有価証券報告書"
    },
    {
      "date": "1996/10",
      "importance": 1,
      "event": "いわき・平田両工場を福島工場に統合",
      "source": "有価証券報告書"
    },
    {
      "date": "1998/9",
      "importance": 2,
      "event": "鈴木喬氏が社長に就任",
      "source": "有価証券報告書"
    },
    {
      "date": "2000/4",
      "importance": 1,
      "event": "自動車用品・ギフト用品事業を子会社に譲渡",
      "source": "有価証券報告書"
    },
    {
      "date": "2001/6",
      "importance": 1,
      "event": "東京都新宿区にエステーＲ＆Ｄセンターを設置",
      "source": "有価証券報告書"
    },
    {
      "date": "2002/11",
      "importance": 2,
      "event": "福島工場平田事業所と九州工場小倉事業所を閉鎖",
      "source": "有価証券報告書"
    },
    {
      "date": "2003/7",
      "importance": 2,
      "event": "カイロ等の温熱用具の販売を開始",
      "source": "有価証券報告書"
    },
    {
      "date": "2004/6",
      "importance": 2,
      "event": "委員会設置会社へ移行",
      "source": "有価証券報告書"
    },
    {
      "date": "2007/8",
      "importance": 3,
      "event": "エステーに商号変更",
      "source": "有価証券報告書"
    },
    {
      "date": "2011/10",
      "importance": 1,
      "event": "九州工場小倉事業所を稼動",
      "source": "有価証券報告書"
    },
    {
      "date": "2013/4",
      "importance": 1,
      "event": "鈴木貴子氏が社長に就任",
      "source": "有価証券報告書"
    },
    {
      "date": "2019/4",
      "importance": 2,
      "event": "栃木工場でカイロの製造を開始",
      "source": "有価証券報告書"
    },
    {
      "date": "2019/9",
      "importance": 1,
      "event": "イタリアのZETA S.R.L.の持分を取得",
      "source": "有価証券報告書"
    },
    {
      "date": "2021/3",
      "importance": 1,
      "event": "ZETA S.R.L.を売却",
      "source": "有価証券報告書"
    },
    {
      "date": "2022/4",
      "importance": 1,
      "event": "プライム市場に移行",
      "source": "有価証券報告書"
    },
    {
      "date": "2023/6",
      "importance": 2,
      "event": "上月洋氏が社長に就任",
      "source": "有価証券報告書"
    },
    {
      "date": "2023/9",
      "importance": 1,
      "event": "香料の受託開発を手がけるコードミーを子会社化",
      "source": "有価証券報告書"
    },
    {
      "date": "2024/6",
      "importance": 2,
      "event": "猫用トイレ用品ニャンとも清潔トイレの事業を取得",
      "source": "有価証券報告書"
    },
    {
      "date": "2025/4",
      "importance": 1,
      "event": "PetBitの株式を取得",
      "source": "有価証券報告書"
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  ]
}