{
  "timeline": [
    {
      "date": "1871/4",
      "category": "会社設立",
      "region": "",
      "importance": 3,
      "event": "郵便事業創業",
      "detail": "前島密の建議により新式郵便制度を開始",
      "significance": "日本の近代郵便制度の原点。現在の日本郵便の事業的起源",
      "source": "有価証券報告書"
    },
    {
      "date": "1872/7",
      "category": "組織再編",
      "region": "",
      "importance": 1,
      "event": "郵便制度を全国的に実施",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1873/4",
      "category": "経営計画",
      "region": "",
      "importance": 2,
      "event": "郵便料金の全国均一制を実施",
      "detail": "",
      "significance": "離島・僻地を含む全国一律サービスの起源。現在に続くユニバーサルサービス義務の原型",
      "source": "有価証券報告書"
    },
    {
      "date": "1875/1",
      "category": "会社設立",
      "region": "",
      "importance": 2,
      "event": "郵便為替事業創業",
      "detail": "外国郵便の取扱いも同時開始",
      "significance": "郵便金融事業の起点。郵貯・かんぽに先立つ金融サービス",
      "source": "有価証券報告書"
    },
    {
      "date": "1875/5",
      "category": "会社設立",
      "region": "",
      "importance": 3,
      "event": "郵便貯金事業創業",
      "detail": "",
      "significance": "現ゆうちょ銀行の起源。国民の貯蓄動員の仕組みとして明治政府が導入",
      "source": "有価証券報告書"
    },
    {
      "date": "1885/12",
      "category": "組織再編",
      "region": "",
      "importance": 2,
      "event": "逓信省発足",
      "detail": "",
      "significance": "郵便・電信・海運等を統括する中央官庁。戦前の郵政事業を所管",
      "source": "有価証券報告書"
    },
    {
      "date": "1892/10",
      "category": "",
      "region": "",
      "importance": 1,
      "event": "小包郵便の取扱いを開始",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1906/3",
      "category": "会社設立",
      "region": "",
      "importance": 1,
      "event": "郵便振替事業創業",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1911/2",
      "category": "",
      "region": "",
      "importance": 1,
      "event": "速達郵便の取扱いを開始",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1916/10",
      "category": "会社設立",
      "region": "",
      "importance": 3,
      "event": "簡易生命保険事業創業",
      "detail": "",
      "significance": "現かんぽ生命の起源。無診査・小口の庶民向け生命保険として国営で開始",
      "source": "有価証券報告書"
    },
    {
      "date": "1926/10",
      "category": "会社設立",
      "region": "",
      "importance": 1,
      "event": "郵便年金事業創業",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1949/6",
      "category": "組織再編",
      "region": "",
      "importance": 2,
      "event": "二省分離に伴い郵政省発足",
      "detail": "逓信省から分離",
      "significance": "戦後郵政事業の所管官庁として郵政省が独立。2001年省庁再編まで続く体制",
      "source": "有価証券報告書"
    },
    {
      "date": "1962/4",
      "category": "",
      "region": "",
      "importance": 1,
      "event": "簡易保険福祉事業団が設立",
      "detail": "かんぽの宿等の運営",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1968/7",
      "category": "",
      "region": "",
      "importance": 2,
      "event": "郵便番号制の実施",
      "detail": "",
      "significance": "郵便処理の機械化・効率化の基盤。物流効率の根本的転換",
      "source": "有価証券報告書"
    },
    {
      "date": "1981/3",
      "category": "",
      "region": "",
      "importance": 1,
      "event": "郵便貯金ATMによる取扱いを開始",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "1991/4",
      "category": "組織再編",
      "region": "",
      "importance": 1,
      "event": "新簡易保険制度の発足",
      "detail": "郵便年金事業を簡易保険事業に統合",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2001/1",
      "category": "組織再編",
      "region": "",
      "importance": 2,
      "event": "省庁再編で総務省・郵政事業庁に再編",
      "detail": "郵政省と自治省・総務庁が統合し総務省発足、郵政事業は郵政事業庁へ",
      "significance": "郵政省の消滅。民営化への第一段階となる組織改変",
      "source": "有価証券報告書"
    },
    {
      "date": "2001/4",
      "category": "経営計画",
      "region": "",
      "importance": 2,
      "event": "郵便貯金資金の全額自主運用を開始",
      "detail": "資金運用部への全額預託義務が廃止",
      "significance": "財政投融資改革の一環。郵貯資金が国の資金循環から切り離され自主運用へ",
      "source": "有価証券報告書"
    },
    {
      "date": "2003/4",
      "category": "組織再編",
      "region": "",
      "importance": 3,
      "event": "日本郵政公社発足",
      "detail": "簡易保険福祉事業団を統合",
      "significance": "小泉政権下での段階的民営化の第1段階。省庁から独立した公社化",
      "source": "有価証券報告書"
    },
    {
      "date": "2005/10",
      "category": "",
      "region": "",
      "importance": 1,
      "event": "投資信託の販売の取扱いを開始",
      "detail": "",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2006/1",
      "category": "会社設立",
      "region": "",
      "importance": 4,
      "event": "日本郵政株式会社を設立",
      "detail": "公社の全額出資により民営化準備の特殊会社として発足",
      "significance": "小泉構造改革の象徴・郵政民営化の実務的スタート。持株会社の誕生",
      "source": "有価証券報告書"
    },
    {
      "date": "2006/9",
      "category": "",
      "region": "",
      "importance": 2,
      "event": "ゆうちょ・かんぽ生命の前身2社を設立",
      "detail": "当社全額出資により株式会社ゆうちょ・株式会社かんぽを設立",
      "significance": "民営化後の金融2事業の受け皿を先行設立",
      "source": "有価証券報告書"
    },
    {
      "date": "2007/10",
      "category": "組織再編",
      "region": "",
      "importance": 5,
      "event": "郵政民営化実施",
      "detail": "郵便事業・郵便局・ゆうちょ銀行・かんぽ生命の4分社化を完了、当社は持株会社に移行",
      "significance": "明治以来続いた国営郵政事業の終焉。日本最大級の民営化。国内金融市場・物流業界の構造を変えた歴史的転機",
      "source": "有価証券報告書"
    },
    {
      "date": "2007/12",
      "category": "",
      "region": "",
      "importance": 1,
      "event": "ゆうちょ銀行が新規業務の認可取得",
      "detail": "シンジケートローン・貸出債権取得譲渡・金利スワップ等",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2008/4",
      "category": "",
      "region": "",
      "importance": 1,
      "event": "ゆうちょ銀行が新規業務の認可取得",
      "detail": "クレジットカード・変額個人年金募集・住宅ローン媒介",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2009/1",
      "category": "",
      "region": "",
      "importance": 1,
      "event": "ゆうちょ銀行が全銀システム接続",
      "detail": "他の金融機関との内国為替取扱を開始",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2012/10",
      "category": "組織再編",
      "region": "",
      "importance": 3,
      "event": "郵便局会社と郵便事業会社を合併",
      "detail": "郵便局会社が日本郵便に商号変更し郵便事業会社を吸収合併",
      "significance": "2007年民営化で4分社化された郵便・物流機能を再統合。民営化設計の軌道修正",
      "source": "有価証券報告書"
    },
    {
      "date": "2014/7",
      "category": "",
      "region": "",
      "importance": 1,
      "event": "がん保険の受託販売開始",
      "detail": "かんぽ生命がAflacのがん保険取扱開始",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2015/5",
      "category": "企業買収",
      "region": "その他",
      "importance": 4,
      "event": "豪Toll Holdingsを子会社化",
      "detail": "日本郵便による豪州物流企業の買収",
      "significance": "民営化後最大級の海外M&A。上場前に成長ストーリーの目玉として実施されたが、後に巨額減損で負の遺産となる",
      "source": "有価証券報告書",
      "amount": "買収総額約6,200億円"
    },
    {
      "date": "2015/11",
      "category": "株式上場",
      "region": "",
      "importance": 5,
      "event": "東証一部上場",
      "detail": "当社・ゆうちょ銀行・かんぽ生命の3社同時上場",
      "significance": "戦後最大級のIPO。国が3社の株式を段階的に売却する民営化完成プロセスの開始",
      "source": "有価証券報告書",
      "amount": "売出総額約1.4兆円"
    },
    {
      "date": "2016/3",
      "category": "組織再編",
      "region": "",
      "importance": 2,
      "event": "かんぽ生命が第一生命と業務提携",
      "detail": "再保険引受・付帯サービス等の新規業務認可も取得",
      "significance": "",
      "source": "有価証券報告書"
    },
    {
      "date": "2016/6",
      "category": "社長交代",
      "region": "",
      "importance": 2,
      "event": "長門正貢が社長就任",
      "detail": "元シティバンク銀行会長",
      "significance": "トール減損処理を含む業績立て直しを担う",
      "source": "有価証券報告書"
    },
    {
      "date": "2017/3",
      "category": "",
      "region": "",
      "importance": 3,
      "event": "初の連結純損失",
      "detail": "Toll Holdings関連のれん減損等",
      "significance": "民営化後初の赤字決算。豪Toll買収の誤算が顕在化し、海外M&A戦略の挫折を象徴",
      "source": "有価証券報告書",
      "amount": "純損失▲290億円"
    },
    {
      "date": "2018/12",
      "category": "経営計画",
      "region": "",
      "importance": 3,
      "event": "Aflac Incorporatedと戦略提携に合意",
      "detail": "資本関係に基づく提携",
      "significance": "かんぽ不適切販売問題直前の金融事業強化策。海外生保との関係強化",
      "source": "有価証券報告書"
    },
    {
      "date": "2019/4",
      "category": "株式上場",
      "region": "",
      "importance": 3,
      "event": "かんぽ生命保険株式の第2次売出し",
      "detail": "引受基準緩和型「かんぽにおまかせ」販売開始と同時期",
      "significance": "国の保有比率引下げの段階的実施。民営化プロセスの継続",
      "source": "有価証券報告書"
    },
    {
      "date": "2019/6",
      "category": "社長交代",
      "region": "",
      "importance": 2,
      "event": "増田寛也が社長就任",
      "detail": "元総務相・岩手県知事",
      "significance": "かんぽ不適切販売発覚後の信頼回復と次期中計策定を担う",
      "source": ""
    },
    {
      "date": "2021/3",
      "category": "経営計画",
      "region": "",
      "importance": 4,
      "event": "楽天グループと業務提携合意",
      "detail": "当社が楽天に出資し物流・金融・DX分野で提携",
      "significance": "民営化後初の大型IT企業との資本提携。EC物流での反転攻勢の基軸となる",
      "source": "有価証券報告書",
      "amount": "当社出資額1,500億円"
    },
    {
      "date": "2021/6",
      "category": "組織再編",
      "region": "",
      "importance": 2,
      "event": "かんぽ生命が保険持株会社から外れる",
      "detail": "当社のかんぽ生命議決権保有比率が49.9%に低下",
      "significance": "民営化法に基づく株式売却完了段階。金融2社の独立性確保",
      "source": "有価証券報告書"
    },
    {
      "date": "2022/4",
      "category": "株式上場",
      "region": "",
      "importance": 2,
      "event": "東証プライム市場へ移行",
      "detail": "当社・ゆうちょ銀行・かんぽ生命の3社が移行",
      "significance": "市場区分再編に伴う形式的移行",
      "source": "有価証券報告書"
    },
    {
      "date": "2023/3",
      "category": "株式上場",
      "region": "",
      "importance": 2,
      "event": "ゆうちょ銀行株式の第2次売出し",
      "detail": "",
      "significance": "国保有比率引下げの継続。民営化プロセスの進展",
      "source": "有価証券報告書"
    },
    {
      "date": "2025/3",
      "category": "株式上場",
      "region": "",
      "importance": 2,
      "event": "ゆうちょ銀行株式の第3次売出し",
      "detail": "",
      "significance": "当社のゆうちょ議決権保有比率を49.9%程度へ引き下げる布石",
      "source": "有価証券報告書"
    },
    {
      "date": "2025/4",
      "category": "企業買収",
      "region": "",
      "importance": 3,
      "event": "トナミHDを子会社化",
      "detail": "日本郵便が株式取得により子会社化。ラストワンマイルを超えた総合物流企業化の起点",
      "significance": "楽天提携に続く物流強化策。次期中計の総合物流企業戦略の第一歩",
      "source": "有価証券報告書"
    },
    {
      "date": "2025/6",
      "category": "社長交代",
      "region": "",
      "importance": 2,
      "event": "鈴木康雄が社長就任",
      "detail": "グループ経営陣を刷新",
      "significance": "民営化以降の社長短命化が続く中での新体制。物流・不動産フロービジネスへの戦略転換を主導",
      "source": "IR"
    },
    {
      "date": "2025/10",
      "category": "組織再編",
      "region": "",
      "importance": 3,
      "event": "日本郵便が一般貨物自動車運送事業の認可取消処分",
      "detail": "点呼不備事案に伴う行政処分",
      "significance": "民営化以降最大級の行政処分。ゆうパック事業のレピュテーション毀損と顧客離反を招く",
      "source": "IR",
      "amount": "費用増90億円規模"
    },
    {
      "date": "2025/11",
      "category": "経営計画",
      "region": "",
      "importance": 3,
      "event": "次期中計骨子を公表",
      "detail": "株主還元偏重から郵便物流・不動産フロービジネス強化へ方針転換",
      "significance": "新体制による事業ポートフォリオ再構築の宣言。数値目標は2026年5月に公表予定",
      "source": "IR"
    }
  ]
}