{
  "timeline": [
    {
      "date": "1929/9",
      "category": "",
      "region": "",
      "importance": 1,
      "event": "酸素の製造・販売を目的として、北海道札幌市白石区菊水５条２丁目17号に資本金15万円をもって北海酸素株式会社を設立",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1952/12",
      "category": "",
      "region": "",
      "importance": 1,
      "event": "溶解アセチレンの製造・販売を開始",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1955/12",
      "category": "",
      "region": "",
      "importance": 1,
      "event": "ＬＰガスの販売を開始",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1966/8",
      "category": "",
      "region": "",
      "importance": 1,
      "event": "商号を「株式会社ほくさん」に変更",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1967/4",
      "category": "",
      "region": "",
      "importance": 1,
      "event": "北海道札幌市中央区北３条西１丁目２番地に本店を移転",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1967/5",
      "category": "設備投資",
      "region": "",
      "importance": 1,
      "event": "北海道室蘭市に酸素オンサイトプラントを建設",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1979/9",
      "category": "株式上場",
      "region": "",
      "importance": 3,
      "event": "東京証券取引所市場第一部に株式を上場",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1981/3",
      "category": "",
      "region": "",
      "importance": 1,
      "event": "冷凍食品の製造・販売を開始",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1993/4",
      "category": "組織再編",
      "region": "",
      "importance": 3,
      "event": "大同酸素株式会社〔同社の沿革は下記に表記〕と合併し、商号を「大同ほくさん株式会社」に変更",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1993/9",
      "category": "設備投資",
      "region": "",
      "importance": 1,
      "event": "北海道千歳市に窒素製造工場を建設",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1995/12",
      "category": "設備投資",
      "region": "",
      "importance": 1,
      "event": "栃木県宇都宮市に酸素・窒素等の製造工場を建設",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1998/9",
      "category": "企業買収",
      "region": "",
      "importance": 2,
      "event": "タテホ化学工業株式会社(現　連結子会社)の第三者割当増資を引受け",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2000/4",
      "category": "組織再編",
      "region": "",
      "importance": 3,
      "event": "共同酸素株式会社〔同社の沿革は下記に表記〕と合併し、商号を「エア・ウォーター株式会社」に変更",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2002/9",
      "category": "",
      "region": "",
      "importance": 1,
      "event": "住金ケミカル株式会社に資本参加",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2007/8",
      "category": "企業買収",
      "region": "",
      "importance": 2,
      "event": "エア・ウォーター防災株式会社（現　連結子会社）を株式交換により完全子会社化",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2007/9",
      "category": "企業買収",
      "region": "",
      "importance": 2,
      "event": "株式会社日本海水（現　連結子会社）に資本参加",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2007/10",
      "category": "",
      "region": "",
      "importance": 1,
      "event": "長野県松本市に総合開発研究所を開設",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2012/9",
      "category": "企業買収",
      "region": "",
      "importance": 2,
      "event": "ゴールドパック株式会社（現　連結子会社）を株式取得により完全子会社化",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2015/6",
      "category": "企業買収",
      "region": "",
      "importance": 2,
      "event": "川崎化成工業株式会社（現　エア・ウォーター・パフォーマンスケミカル株式会社）（現　連結子会社）を株式取得により子会社化",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2015/9",
      "category": "企業買収",
      "region": "",
      "importance": 2,
      "event": "株式会社九州屋（現　連結子会社）を株式取得により子会社化",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2016/2",
      "category": "企業買収",
      "region": "",
      "importance": 2,
      "event": "Taylor-Wharton Malaysia Sdn.Bhd. （現　連結子会社）を株式取得により子会社化",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2016/9",
      "category": "企業買収|組織再編",
      "region": "",
      "importance": 3,
      "event": "大山ハム株式会社（春雪さぶーる株式会社（現　エア・ウォーターアグリ＆フーズ株式会社）（現　連結子会社）を存続会社として合併し、消滅）を株式取得により子会社化",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2016/12",
      "category": "企業買収",
      "region": "",
      "importance": 2,
      "event": "川本産業株式会社（現　連結子会社）を株式取得により子会社化",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2018/5",
      "category": "企業買収",
      "region": "",
      "importance": 2,
      "event": "川崎化成工業株式会社（現　エア・ウォーター・パフォーマンスケミカル株式会社）（現　連結子会社）を株式取得により完全子会社化",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2019/4",
      "category": "事業売却",
      "region": "",
      "importance": 2,
      "event": "コールケミカル事業を新日鐵住金株式会社（現　日本製鉄株式会社）及び新日鉄住金化学株式会社（現　日鉄ケミカル＆マテリアル株式会社）へ事業譲渡",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2019/6",
      "category": "",
      "region": "",
      "importance": 1,
      "event": "大阪府大阪市中央区南船場２丁目12番８号に本店を移転",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2019/7",
      "category": "",
      "region": "東南アジア",
      "importance": 1,
      "event": "インド　PRAXAIR INDIA PRIVATE LIMITEDの産業ガス事業を一部譲受",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2019/7",
      "category": "企業買収",
      "region": "",
      "importance": 2,
      "event": "HITEC Holding B.V. （現　連結子会社）を株式取得により完全子会社化",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2019/12",
      "category": "",
      "region": "東南アジア",
      "importance": 1,
      "event": "インド　LINDE INDIA LIMITEDの産業ガス事業を一部譲受",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2020/10",
      "category": "組織再編",
      "region": "",
      "importance": 3,
      "event": "各地域事業会社を８社から３社に統合し、全国の地域事業を再編",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2021/3",
      "category": "企業買収",
      "region": "",
      "importance": 2,
      "event": "株式会社日本海水（現　連結子会社）を株式交換により完全子会社化",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2022/4",
      "category": "",
      "region": "",
      "importance": 1,
      "event": "東京証券取引所の市場区分見直しにより市場第一部からプライム市場へ移行",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2025/4",
      "category": "設備投資",
      "region": "",
      "importance": 1,
      "event": "大阪府堺市に産業ガスプラント・機器の総合エンジニアリング拠点「グローバルエンジニアリングセンター」を開設",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2025/5",
      "category": "企業買収",
      "region": "",
      "importance": 2,
      "event": "川本産業株式会社（現　連結子会社）を株式取得により完全子会社化",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1933/3",
      "category": "",
      "region": "",
      "importance": 1,
      "event": "酸素の製造・販売を目的として、大阪府大阪市西成区津守町67番地に資本金30万円をもって大同酸素株式会社を設立",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1944/6",
      "category": "設備投資",
      "region": "",
      "importance": 1,
      "event": "大阪府堺市に堺工場を建設",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1961/9",
      "category": "株式上場",
      "region": "",
      "importance": 3,
      "event": "東京証券取引所市場第一部に株式を上場",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1983/10",
      "category": "業務提携",
      "region": "米州",
      "importance": 2,
      "event": "米国エア・プロダクツ・アンド・ケミカルズ・インコーポレーテッドと資本提携並びに技術援助契約を締結",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1991/4",
      "category": "会社設立",
      "region": "",
      "importance": 3,
      "event": "近畿冷熱株式会社(現　大阪ガスリキッド株式会社)との共同出資により株式会社クリオ・エアー(現　持分法適用関連会社)を設立",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1993/4",
      "category": "組織再編",
      "region": "",
      "importance": 3,
      "event": "株式会社ほくさんを存続会社として合併",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1962/2",
      "category": "",
      "region": "",
      "importance": 1,
      "event": "酸素・窒素の製造販売を目的として、資本金１億円をもって共同酸素株式会社を設立(本店の所在地和歌山市)",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1962/3",
      "category": "設備投資",
      "region": "",
      "importance": 1,
      "event": "和歌山工場を和歌山県和歌山市(住友金属工業株式会社（現　日本製鉄株式会社）和歌山製鉄所内)に、小倉工場を福岡県小倉市(現　北九州市小倉北区)(住友金属工業株式会社（現　日本製鉄株式会社）小倉製鉄所内)にそれぞれ開設",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1962/9",
      "category": "",
      "region": "",
      "importance": 1,
      "event": "酸素・窒素の製造販売を開始",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1968/1",
      "category": "設備投資",
      "region": "",
      "importance": 1,
      "event": "鹿島工場を茨城県鹿島郡鹿島町(現　茨城県鹿嶋市)(住友金属工業株式会社（現　日本製鉄株式会社）鹿島製鉄所内)に開設",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1991/7",
      "category": "",
      "region": "",
      "importance": 1,
      "event": "本店の所在地を大阪市中央区に変更",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1996/1",
      "category": "株式上場",
      "region": "",
      "importance": 3,
      "event": "大阪証券取引所市場第二部に上場",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1996/5",
      "category": "業務提携",
      "region": "",
      "importance": 2,
      "event": "大同ほくさん株式会社と業務提携",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2000/4",
      "category": "組織再編",
      "region": "",
      "importance": 3,
      "event": "大同ほくさん株式会社を存続会社として合併",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    }
  ]
}