{
  "timeline": [
    {
      "date": "1895/4",
      "category": "会社設立",
      "region": "",
      "importance": 3,
      "event": "島津源蔵が京都で鉛蓄電池の国産化に着手",
      "detail": "日本電池（旧社名）の源流。島津製作所からの分離",
      "significance": "日本初の鉛蓄電池国産化事業の始まり",
      "source": ""
    },
    {
      "date": "1917/3",
      "category": "組織再編",
      "region": "",
      "importance": 2,
      "event": "日本電池㈱を設立",
      "detail": "島津源蔵の蓄電池事業を会社化",
      "significance": "日本の蓄電池産業の基盤企業が誕生",
      "source": ""
    },
    {
      "date": "1918/3",
      "category": "組織再編",
      "region": "",
      "importance": 2,
      "event": "湯浅蓄電池製造㈱を設立",
      "detail": "湯浅七左衛門が大阪で創業",
      "significance": "もう一方の源流。関西系の蓄電池メーカー",
      "source": ""
    },
    {
      "date": "2004/4",
      "category": "組織再編",
      "region": "",
      "importance": 4,
      "event": "日本電池と㈱ユアサコーポレーションが経営統合し当社を設立",
      "detail": "株式移転により持株会社ジーエス・ユアサコーポレーションが発足",
      "significance": "鉛蓄電池の国内2強統合で業界再編の象徴",
      "source": "有価証券報告書"
    },
    {
      "date": "2004/4",
      "category": "株式上場",
      "region": "",
      "importance": 2,
      "event": "東証一部・大証一部に上場",
      "detail": "株式移転と同時に新設上場",
      "significance": "統合新会社の市場デビュー",
      "source": "有価証券報告書"
    },
    {
      "date": "2005/10",
      "category": "",
      "region": "その他",
      "importance": 2,
      "event": "インドにTata AutoComp GY Batteriesを合弁設立",
      "detail": "タタグループとのJV",
      "significance": "新興国の自動車電池市場に本格参入",
      "source": "有価証券報告書"
    },
    {
      "date": "2007/12",
      "category": "",
      "region": "",
      "importance": 3,
      "event": "三菱商事・三菱自動車と合弁で㈱リチウムエナジージャパン（LEJ）を設立",
      "detail": "車載用LiB量産の布石",
      "significance": "PHEV・EV時代を見据えた日本勢のLiB事業体制構築",
      "source": "有価証券報告書"
    },
    {
      "date": "2009/4",
      "category": "",
      "region": "",
      "importance": 3,
      "event": "本田技研工業との合弁で㈱ブルーエナジー（BEC）を設立",
      "detail": "HEV用LiB量産の布石",
      "significance": "ホンダとの深い協業関係の起点。後の車載LiB主力拠点",
      "source": "有価証券報告書"
    },
    {
      "date": "2009/7",
      "category": "",
      "region": "",
      "importance": 2,
      "event": "一般募集増資と第三者割当増資で資本金を330億円に",
      "detail": "LiB投資に備えた資本増強",
      "significance": "金融危機後のLiB投資資金確保",
      "source": "有価証券報告書",
      "amount": "資本金33,021百万円"
    },
    {
      "date": "2010/12",
      "category": "",
      "region": "東南アジア",
      "importance": 1,
      "event": "インドネシアのPT. Trimitra Baterai Prakasaへ増資し持分法適用化",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2012/3",
      "category": "設備投資",
      "region": "",
      "importance": 3,
      "event": "滋賀県栗東市にLEJ第一工場棟を建設・生産開始",
      "detail": "車載用LiBの国内量産拠点",
      "significance": "PHEV・EV向けLiB国産量産の本格スタート",
      "source": "有価証券報告書"
    },
    {
      "date": "2013/5",
      "category": "",
      "region": "東南アジア",
      "importance": 1,
      "event": "タイのSiam GS Batteryを連結子会社化",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2014/6",
      "category": "社長交代",
      "region": "",
      "importance": 2,
      "event": "村尾修が社長に就任",
      "detail": "依田誠から交代",
      "significance": "新体制発足",
      "source": "有価証券報告書"
    },
    {
      "date": "2015/10",
      "category": "企業買収",
      "region": "欧州",
      "importance": 3,
      "event": "トルコInci Akuを持分法適用関連会社化（Inci GS Yuasaに社名変更）",
      "detail": "",
      "significance": "欧州・中東市場への本格アクセス",
      "source": "有価証券報告書"
    },
    {
      "date": "2015/12",
      "category": "企業買収",
      "region": "東南アジア",
      "importance": 1,
      "event": "マレーシアのYuasa Battery Malaysiaを連結子会社化",
      "detail": "Siam GS Battery経由で取得",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2016/10",
      "category": "企業買収",
      "region": "",
      "importance": 4,
      "event": "パナソニックの鉛蓄電池事業を譲受（旧パナソニックストレージバッテリー→GSユアサエナジー）",
      "detail": "国内鉛蓄電池事業の再編",
      "significance": "国内鉛蓄電池3社体制から2強体制への集約",
      "source": "有価証券報告書",
      "amount": "出資比率85.1％取得"
    },
    {
      "date": "2017/10",
      "category": "",
      "region": "欧州",
      "importance": 2,
      "event": "ハンガリーにGS Yuasa Hungaryを設立",
      "detail": "欧州事業拡大",
      "significance": "欧州自動車向け電池の現地化",
      "source": "有価証券報告書"
    },
    {
      "date": "2018/9",
      "category": "企業買収",
      "region": "",
      "importance": 1,
      "event": "GSユアサエナジーを100％子会社化",
      "detail": "追加14.9％取得",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2021/5",
      "category": "企業買収",
      "region": "",
      "importance": 3,
      "event": "サンケン電気の社会システム事業を譲受（GSユアサインフラシステムズ）",
      "detail": "",
      "significance": "社会インフラ向け産業電池電源事業の強化",
      "source": "有価証券報告書"
    },
    {
      "date": "2022/4",
      "category": "株式上場",
      "region": "",
      "importance": 1,
      "event": "東証プライム市場へ移行",
      "detail": "",
      "significance": "市場区分見直しに伴う",
      "source": "有価証券報告書"
    },
    {
      "date": "2022/5",
      "category": "企業買収",
      "region": "欧州",
      "importance": 3,
      "event": "トルコInci GS Yuasaを追加取得し連結子会社化",
      "detail": "持分法→連結",
      "significance": "欧州・中東自動車電池事業の直接掌握",
      "source": "有価証券報告書"
    },
    {
      "date": "2023/4",
      "category": "組織再編",
      "region": "",
      "importance": 1,
      "event": "GSユアサインフラシステムズをGSユアサへ吸収合併",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2023/7",
      "category": "",
      "region": "",
      "importance": 3,
      "event": "ホンダと合弁で㈱Honda・GS Yuasa EV Battery R&D（HGYB）を設立",
      "detail": "BEV用LiB共同開発拠点",
      "significance": "BEV用次世代電池の本格開発体制",
      "source": "有価証券報告書"
    },
    {
      "date": "2023",
      "category": "経営計画",
      "region": "",
      "importance": 3,
      "event": "Vision 2035を発表",
      "detail": "2035年にエネルギー・マネジメント企業へ転換",
      "significance": "既存鉛蓄電池企業からの事業モデル再定義宣言",
      "source": ""
    },
    {
      "date": "2023/10",
      "category": "組織再編",
      "region": "中国",
      "importance": 2,
      "event": "中国2社（天津・順徳）を連結除外し持分法適用化",
      "detail": "",
      "significance": "中国事業の縮小再編",
      "source": "有価証券報告書"
    },
    {
      "date": "2023/12",
      "category": "",
      "region": "",
      "importance": 3,
      "event": "公募増資・第三者割当増資で資本金を528億円に",
      "detail": "BEV用LiB投資原資の調達",
      "significance": "滋賀BEV工場建設への先行投資",
      "source": "有価証券報告書",
      "amount": "資本金52,841百万円"
    },
    {
      "date": "2024/3",
      "category": "組織再編",
      "region": "",
      "importance": 2,
      "event": "GSユアサがLEJの事業を譲受",
      "detail": "車載用LiBの事業統合",
      "significance": "車載LiB事業の内製集約と赤字会社清算",
      "source": "有価証券報告書",
      "amount": "LEJ税効果約50億円発生"
    },
    {
      "date": "2024/6",
      "category": "社長交代",
      "region": "",
      "importance": 2,
      "event": "阿部貴志が社長に就任",
      "detail": "村尾修から交代。村尾は9年の在任を終え退任",
      "significance": "Vision 2035発表を区切りに世代交代",
      "source": "IR"
    },
    {
      "date": "2024/9",
      "category": "組織再編",
      "region": "",
      "importance": 1,
      "event": "LEJの清算手続き完了",
      "detail": "連結範囲から除外",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2024/9",
      "category": "",
      "region": "",
      "importance": 1,
      "event": "第3回無担保社債（サステナビリティ・リンク・ボンド）発行",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2025/3",
      "category": "",
      "region": "",
      "importance": 2,
      "event": "FY24連結売上高5,803億円・営業利益500億円",
      "detail": "鉛蓄電池値上げ浸透と円安で過去最高益水準",
      "significance": "既存事業の稼ぐ力が顕在化",
      "source": "有価証券報告書",
      "amount": "売上580,340百万円/営業利益50,028百万円"
    },
    {
      "date": "2025/3",
      "category": "設備投資",
      "region": "",
      "importance": 3,
      "event": "滋賀県にBEV用LiB第2工場を建設中（総投資2,000億円・20GWh構想）",
      "detail": "ホンダとのBEV用量産拠点",
      "significance": "日本勢のBEV電池量産の本命拠点の一つ",
      "source": "IR"
    }
  ]
}