{
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  "stock_code": "2221",
  "company_name": "岩塚製菓",
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  "updated": "2026-09-06",
  "license": "© 2026 Yutaka Sugiura. All rights reserved.",
  "attribution": "The社史 (the-shashi.com) — https://the-shashi.com/tse/2221/",
  "source": {
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      "date": "1947",
      "importance": 2,
      "event": "岩塚農産加工場を創業",
      "source": "https://www.iwatsukaseika.co.jp/about/history/"
    },
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      "date": "1954/4",
      "importance": 2,
      "event": "岩塚農産加工場を設立",
      "source": "有価証券報告書"
    },
    {
      "date": "1958",
      "importance": 2,
      "event": "「苑月焼」を発売",
      "source": "https://www.iwatsukaseika.co.jp/about/history/"
    },
    {
      "date": "1960/11",
      "importance": 2,
      "event": "岩塚製菓に商号変更",
      "source": "有価証券報告書"
    },
    {
      "date": "1963/1",
      "importance": 2,
      "event": "本社工場（飯塚工場西棟）が竣工",
      "source": "有価証券報告書"
    },
    {
      "date": "1966",
      "importance": 3,
      "event": "「お子様せんべい」を発売",
      "source": "https://www.iwatsukaseika.co.jp/about/history/"
    },
    {
      "date": "1972/8",
      "importance": 1,
      "event": "中沢工場が竣工",
      "source": "有価証券報告書"
    },
    {
      "date": "1982/3",
      "importance": 2,
      "event": "高級米菓専門店「瑞花本店」を開店",
      "source": "有価証券報告書"
    },
    {
      "date": "1983/1",
      "importance": 3,
      "event": "宜蘭食品工業と米菓製造で業務提携",
      "source": "有価証券報告書"
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    {
      "date": "1985/3",
      "importance": 1,
      "event": "瑞花本店を瑞花に改組",
      "source": "有価証券報告書"
    },
    {
      "date": "1988/2",
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      "event": "新潟味のれん本舗を設立",
      "source": "有価証券報告書"
    },
    {
      "date": "1989/10",
      "importance": 1,
      "event": "日本証券業協会に株式を店頭登録",
      "source": "有価証券報告書"
    },
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      "date": "1990/7",
      "importance": 2,
      "event": "宜蘭食品工業との合弁で台湾岩塚製菓を設立",
      "source": "有価証券報告書"
    },
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      "date": "1990/11",
      "importance": 1,
      "event": "千歳工場が竣工",
      "source": "有価証券報告書"
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      "date": "1994/2",
      "importance": 1,
      "event": "沢下条工場中央棟が竣工",
      "source": "有価証券報告書"
    },
    {
      "date": "1994/4",
      "importance": 1,
      "event": "越後抄を設立",
      "source": "有価証券報告書"
    },
    {
      "date": "1995/4",
      "importance": 2,
      "event": "宜蘭食品工業と台湾岩塚製菓が合併",
      "source": "有価証券報告書"
    },
    {
      "date": "2002/7",
      "importance": 2,
      "event": "WANT WANT HOLDINGSとの合弁で瀋陽岩旺米粉製造を設立",
      "source": "有価証券報告書"
    },
    {
      "date": "2003/7",
      "importance": 2,
      "event": "WANT WANT HOLDINGSとの合弁で旺旺・ジャパンを設立",
      "source": "有価証券報告書"
    },
    {
      "date": "2004/4",
      "importance": 1,
      "event": "長岡工場が操業開始",
      "source": "有価証券報告書"
    },
    {
      "date": "2004/12",
      "importance": 1,
      "event": "ジャスダック証券取引所に上場",
      "source": "有価証券報告書"
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      "date": "2010/4",
      "importance": 1,
      "event": "大阪証券取引所JASDAQに上場",
      "source": "有価証券報告書"
    },
    {
      "date": "2011",
      "importance": 3,
      "event": "原料米を国産米100パーセントに切替",
      "source": "https://www.iwatsukaseika.co.jp/about/history/"
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    {
      "date": "2011/12",
      "importance": 2,
      "event": "瀋陽岩旺米粉製造の全株式を売却",
      "source": "有価証券報告書"
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      "date": "2013/7",
      "importance": 1,
      "event": "東京証券取引所JASDAQに上場",
      "source": "有価証券報告書"
    },
    {
      "date": "2015/7",
      "importance": 2,
      "event": "田辺菓子舗を完全子会社化",
      "source": "有価証券報告書"
    },
    {
      "date": "2018/11",
      "importance": 1,
      "event": "IWATSUKA USA Inc.を設立",
      "source": "有価証券報告書"
    },
    {
      "date": "2020/3",
      "importance": 1,
      "event": "越後抄を清算結了",
      "source": "有価証券報告書"
    },
    {
      "date": "2020/12",
      "importance": 2,
      "event": "BEIKA Labが竣工",
      "source": "有価証券報告書"
    },
    {
      "date": "2021/1",
      "importance": 2,
      "event": "新長岡工場が竣工",
      "source": "有価証券報告書"
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    {
      "date": "2021/3",
      "importance": 1,
      "event": "中沢工場を閉鎖",
      "source": "有価証券報告書"
    },
    {
      "date": "2021/9",
      "importance": 1,
      "event": "本社を移転",
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    {
      "date": "2022/4",
      "importance": 1,
      "event": "スタンダード市場に移行",
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}