{
  "timeline": [
    {
      "date": "1907/7",
      "category": "会社設立",
      "region": "",
      "importance": 3,
      "event": "日本製麻と北海道製麻が合併し帝国製麻株式会社を設立",
      "detail": "当社の前身会社。明治期の麻紡績主要2社が合流",
      "significance": "日本の麻紡績業を代表する会社の出発点。北海道製麻系の事業基盤を継承",
      "source": "有価証券報告書"
    },
    {
      "date": "1923/8",
      "category": "企業買収",
      "region": "",
      "importance": 1,
      "event": "日本麻糸株式会社を合併",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1928/3",
      "category": "企業買収",
      "region": "",
      "importance": 1,
      "event": "昭和製麻株式会社を合併",
      "detail": "",
      "significance": "業界再編による規模拡大",
      "source": "有価証券報告書"
    },
    {
      "date": "1941/8",
      "category": "企業買収|業態転換",
      "region": "",
      "importance": 2,
      "event": "太陽レーヨン株式会社を合併し帝国繊維株式会社に商号変更",
      "detail": "麻専業からレーヨンを含む繊維総合へ転換し商号変更",
      "significance": "商号を帝国繊維とし繊維総合化への布石",
      "source": "有価証券報告書"
    },
    {
      "date": "1942/10",
      "category": "企業買収",
      "region": "",
      "importance": 1,
      "event": "大正製麻・東洋麻工業・日本麻紡織の3社を合併",
      "detail": "戦時統合下の麻業界集約",
      "significance": "戦時統合の進展",
      "source": "有価証券報告書"
    },
    {
      "date": "1944/2",
      "category": "企業買収|海外進出",
      "region": "中国",
      "importance": 1,
      "event": "台湾製麻株式会社を合併",
      "detail": "戦時下に台湾の麻紡績会社を取り込み",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1945/1",
      "category": "企業買収",
      "region": "",
      "importance": 1,
      "event": "日本油脂株式会社繊維部門の事業を譲受",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1950/7",
      "category": "構造改革|組織再編",
      "region": "",
      "importance": 3,
      "event": "過度経済力集中排除法により帝国繊維を解散し中央繊維・帝国製麻ほか1社を設立",
      "detail": "財閥解体・過度経済力集中排除法に基づく強制分割",
      "significance": "財閥解体の象徴的事例。戦前の繊維コングロマリットが3社に分割される",
      "source": "有価証券報告書"
    },
    {
      "date": "1950/9",
      "category": "株式上場",
      "region": "",
      "importance": 2,
      "event": "中央繊維と帝国製麻ともに東京証券取引所に上場",
      "detail": "分割直後に両社が同時上場",
      "significance": "公開企業として戦後再出発の基盤を確保",
      "source": "有価証券報告書"
    },
    {
      "date": "1959/11",
      "category": "組織再編",
      "region": "",
      "importance": 3,
      "event": "中央繊維が帝国製麻を合併し帝国繊維株式会社に商号変更",
      "detail": "1950年に分割された両社が9年後に再統合",
      "significance": "財閥解体時に分かれた事業の再結合。戦後復興期の業界再編の象徴",
      "source": "有価証券報告書"
    },
    {
      "date": "1960/7",
      "category": "組織再編",
      "region": "",
      "importance": 1,
      "event": "子会社の帝商株式会社が発足",
      "detail": "1952年設立の船山商店を商号変更",
      "significance": "商社機能の整備",
      "source": "有価証券報告書"
    },
    {
      "date": "1961/10",
      "category": "",
      "region": "",
      "importance": 1,
      "event": "東京証券取引所市場第一部に指定",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1973/11",
      "category": "組織再編",
      "region": "",
      "importance": 1,
      "event": "子会社の宮崎クラウン株式会社を設立",
      "detail": "1977年12月にテイセン産業へ商号変更",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1979/6",
      "category": "組織再編",
      "region": "",
      "importance": 1,
      "event": "子会社のキンパイ商事株式会社を設立",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1991/7",
      "category": "組織再編",
      "region": "",
      "importance": 1,
      "event": "子会社のテイセン化成株式会社を設立",
      "detail": "1995年11月にテイセンテクノへ商号変更",
      "significance": "化成品系子会社の設立",
      "source": "有価証券報告書"
    },
    {
      "date": "1996/8",
      "category": "企業買収",
      "region": "",
      "importance": 1,
      "event": "株式会社六合社の株式追加取得により子会社化",
      "detail": "2007年5月にテイセン産業に合併",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2021/8",
      "category": "設備投資",
      "region": "",
      "importance": 1,
      "event": "下野工場を新設",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2022/4",
      "category": "",
      "region": "",
      "importance": 1,
      "event": "東京証券取引所プライム市場に移行",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    }
  ]
}