{
  "spec_version": "3",
  "endpoint": "timeline",
  "stock_code": "8282",
  "company_name": "ケーズホールディングス",
  "content_lang": "ja",
  "meta_lang": "en",
  "canonical_url": "https://the-shashi.com/tse/8282/",
  "api_url": "/api/8282/timeline.json",
  "updated": "2026-08-12",
  "license": "© 2026 Yutaka Sugiura. All rights reserved.",
  "attribution": "The社史 (the-shashi.com) — https://the-shashi.com/tse/8282/",
  "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": "1947/3",
      "importance": 3,
      "event": "加藤馨氏が水戸市の借家でラジオ受信機の販売修理業を開始",
      "source": "有価証券報告書"
    },
    {
      "date": "1955/10",
      "importance": 2,
      "event": "加藤電機商会を設立",
      "source": "有価証券報告書"
    },
    {
      "date": "1971/5",
      "importance": 1,
      "event": "カトーデンキに商号変更",
      "source": "有価証券報告書"
    },
    {
      "date": "1972/5",
      "importance": 1,
      "event": "水戸市城南に駅南店を開店",
      "source": "有価証券報告書"
    },
    {
      "date": "1973/9",
      "importance": 1,
      "event": "組織変更により株式会社カトーデンキを設立",
      "source": "有価証券報告書"
    },
    {
      "date": "1979/7",
      "importance": 3,
      "event": "効率の向上を目指した定番制度を導入",
      "source": "有価証券報告書"
    },
    {
      "date": "1980/9",
      "importance": 3,
      "event": "家電小売のカトーデンキ販売と不動産賃貸のカトーデンキに分離",
      "source": "有価証券報告書"
    },
    {
      "date": "1984/9",
      "importance": 2,
      "event": "水戸市浜田にサービスセンターを開設し集中配送を開始",
      "source": "有価証券報告書"
    },
    {
      "date": "1985/3",
      "importance": 1,
      "event": "カトーデンキを吸収合併",
      "source": "有価証券報告書"
    },
    {
      "date": "1987/5",
      "importance": 2,
      "event": "全店にPOSシステムを導入",
      "source": "有価証券報告書"
    },
    {
      "date": "1988/4",
      "importance": 1,
      "event": "日本証券業協会東京地区協会に株式を店頭登録",
      "source": "有価証券報告書"
    },
    {
      "date": "1991/7",
      "importance": 2,
      "event": "よつば電機の株式80％を取得しフランチャイズ契約を締結",
      "source": "有価証券報告書"
    },
    {
      "date": "1997/11",
      "importance": 2,
      "event": "ケーズデンキに商号変更",
      "source": "有価証券報告書"
    },
    {
      "date": "2000/7",
      "importance": 1,
      "event": "携帯電話を扱うモバイルシステムひたちなかを設立",
      "source": "有価証券報告書"
    },
    {
      "date": "2001/2",
      "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": "2002/3",
      "importance": 1,
      "event": "東京証券取引所市場第一部に昇格",
      "source": "有価証券報告書"
    },
    {
      "date": "2004/4",
      "importance": 3,
      "event": "ギガスと株式交換しギガスケーズデンキに商号変更",
      "source": "有価証券報告書"
    },
    {
      "date": "2004/10",
      "importance": 2,
      "event": "八千代ムセン電機と株式交換",
      "source": "有価証券報告書"
    },
    {
      "date": "2005/10",
      "importance": 2,
      "event": "ビッグ・エスと株式交換",
      "source": "有価証券報告書"
    },
    {
      "date": "2007/1",
      "importance": 2,
      "event": "北越ケーズと株式交換",
      "source": "有価証券報告書"
    },
    {
      "date": "2007/1",
      "importance": 1,
      "event": "水戸市に九州ケーズデンキを設立",
      "source": "有価証券報告書"
    },
    {
      "date": "2007/2",
      "importance": 3,
      "event": "ケーズホールディングスに商号変更",
      "source": "有価証券報告書"
    },
    {
      "date": "2007/4",
      "importance": 2,
      "event": "デンコードーと株式交換",
      "source": "有価証券報告書"
    },
    {
      "date": "2019/6",
      "importance": 2,
      "event": "テクニカルアーツの株式を100％取得し子会社化",
      "source": "有価証券報告書"
    },
    {
      "date": "2022/3",
      "importance": 1,
      "event": "サワハタキャリーサービスと株式交換",
      "source": "有価証券報告書"
    },
    {
      "date": "2022/4",
      "importance": 1,
      "event": "東京証券取引所プライム市場に移行",
      "source": "有価証券報告書"
    },
    {
      "date": "2022/8",
      "importance": 1,
      "event": "水戸市に本社ビルを竣工し本店所在地を移転",
      "source": "有価証券報告書"
    }
  ]
}