{
  "spec_version": "3",
  "endpoint": "timeline",
  "stock_code": "sanko-seika",
  "company_name": "三幸製菓",
  "content_lang": "ja",
  "meta_lang": "en",
  "canonical_url": "https://the-shashi.com/tse/sanko-seika/",
  "api_url": "/api/sanko-seika/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/sanko-seika/",
  "source": {
    "primary": [
      "三幸製菓 沿革",
      "三幸製菓 会社概要",
      "三幸製菓 ニュースリリース"
    ],
    "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": "1962/8",
      "importance": 2,
      "event": "三幸製菓を設立",
      "source": "三幸製菓 会社概要"
    },
    {
      "date": "1963",
      "importance": 1,
      "event": "新崎第一工場の操業開始",
      "source": "三幸製菓 沿革"
    },
    {
      "date": "1971",
      "importance": 1,
      "event": "新崎第二工場の操業開始と海苔製品の開発着手",
      "source": "三幸製菓 沿革"
    },
    {
      "date": "1974",
      "importance": 1,
      "event": "豊栄工場の操業開始",
      "source": "三幸製菓 沿革"
    },
    {
      "date": "1975",
      "importance": 3,
      "event": "ぱりんこ発売",
      "source": "三幸製菓 沿革"
    },
    {
      "date": "1977",
      "importance": 3,
      "event": "雪の宿発売",
      "source": "三幸製菓 沿革"
    },
    {
      "date": "1979",
      "importance": 2,
      "event": "佐藤富一郎氏が社長に就任",
      "source": "三幸製菓 沿革"
    },
    {
      "date": "1982",
      "importance": 1,
      "event": "荒川第一工場の操業開始",
      "source": "三幸製菓 沿革"
    },
    {
      "date": "1989",
      "importance": 2,
      "event": "売上高100億円を突破",
      "source": "三幸製菓 沿革"
    },
    {
      "date": "1994",
      "importance": 2,
      "event": "本格的なテレビCMの開始",
      "source": "三幸製菓 沿革"
    },
    {
      "date": "2005",
      "importance": 1,
      "event": "研究開発拠点Vステーションの完成",
      "source": "三幸製菓 沿革"
    },
    {
      "date": "2007",
      "importance": 2,
      "event": "佐藤裕紀氏が社長に就任",
      "source": "三幸製菓 沿革"
    },
    {
      "date": "2009",
      "importance": 1,
      "event": "新発田第一工場の操業開始",
      "source": "三幸製菓 沿革"
    },
    {
      "date": "2014",
      "importance": 1,
      "event": "本社新社屋パレットの完成",
      "source": "三幸製菓 沿革"
    },
    {
      "date": "2015",
      "importance": 2,
      "event": "シンハーコーポレーションと合弁会社シンハー三幸を設立",
      "source": "三幸製菓 沿革"
    },
    {
      "date": "2016",
      "importance": 2,
      "event": "山下仁氏が社長に就任",
      "source": "三幸製菓 沿革"
    },
    {
      "date": "2017",
      "importance": 2,
      "event": "売上高500億円を突破",
      "source": "三幸製菓 沿革"
    },
    {
      "date": "2018",
      "importance": 1,
      "event": "新発田工場に自動化した物流センターを新設",
      "source": "三幸製菓 沿革"
    },
    {
      "date": "2020",
      "importance": 3,
      "event": "三幸と合併",
      "source": "三幸製菓 沿革"
    },
    {
      "date": "2022/2",
      "importance": 3,
      "event": "荒川工場で火災事故が発生",
      "source": "三幸製菓 沿革"
    },
    {
      "date": "2022/7",
      "importance": 2,
      "event": "新崎工場と新発田工場の操業再開",
      "source": "三幸製菓 沿革"
    },
    {
      "date": "2022/9",
      "importance": 2,
      "event": "荒川工場の操業再開",
      "source": "三幸製菓 沿革"
    },
    {
      "date": "2023",
      "importance": 1,
      "event": "荒川工場に荒川ロジスティックセンターを新設",
      "source": "三幸製菓 沿革"
    },
    {
      "date": "2024",
      "importance": 2,
      "event": "山下仁氏が社長に就任",
      "source": "三幸製菓 沿革"
    },
    {
      "date": "2025/10",
      "importance": 2,
      "event": "牛膓栄一氏が社長に就任",
      "source": "三幸製菓 ニュースリリース"
    }
  ]
}