{
  "commentary": "## 鹿島家の閨閥支配時代の構成（1961年11月）\n\n1947年に「鹿島建設」と改称し1949年に業界初の技術研究所を設立して10年余りが経った時期の構成（1961年11月30日時点）は、鹿島守之助19,080千株（23.9%）が圧倒的筆頭、続いて鹿島卯女3,480千株・鹿島昭一3,075千株・大和証券2,843千株・渥美健夫2,109千株・渥美伊都子1,242千株・石川六郎870千株・小野威848千株・渡辺喜三郎765千株・石川よし子765千株が上位10名に並ぶ（株式会社年鑑 昭和38年版）。守之助の長女伊都子の夫である渥美健夫はのちに第7代社長（1979年就任）、三女よし子の夫である石川六郎はのちに第8代社長（1985年就任）に就いており、姻族を含む鹿島家系が10名のうち9名を占める閨閥支配の構造であった。\n\n所有者別の区分では個人およびその他が88.3%、金融機関4.6%、証券業者4.5%、その他法人2.5%、外国人0.1%、株主総数6,006名のうち5,805名が個人を占め、原子炉受注や霞が関三井ビル着工へと向かう戦後復興の波に乗りつつも、資本構造は同族支配の時代に踏みとどまっていた（株式会社年鑑 昭和38年版）。直近のFY24（2025年3月期）では日本マスタートラスト信託銀行（17.14%）と日本カストディ銀行（9.47%）の信託2行で発行済の26%超を占め、外国法人比率は23.0%、個人比率は31.0%へ。同族系で上位に残るのは鹿島公子（3.35%）と公益財団法人鹿島学術振興財団（1.53%）に縮退し、戦後の閨閥支配の遺産は鹿島社員持株会（1.95%）と財団に残る。",
  "shareholders": [
    {
      "FY": "FY15",
      "period": "2016/3",
      "rank": 1,
      "name": "日本マスタートラスト信託銀行株式会社(信託口)",
      "shareholding_ratio": 5.52,
      "shares_held": 58370000
    },
    {
      "FY": "FY15",
      "period": "2016/3",
      "rank": 2,
      "name": "日本トラスティ・サービス信託銀行株式会社(信託口)",
      "shareholding_ratio": 4.96,
      "shares_held": 52464000
    },
    {
      "FY": "FY15",
      "period": "2016/3",
      "rank": 3,
      "name": "鹿 島 昭 一",
      "shareholding_ratio": 2.99,
      "shares_held": 31585000
    },
    {
      "FY": "FY15",
      "period": "2016/3",
      "rank": 4,
      "name": "株式会社三井住友銀行",
      "shareholding_ratio": 1.93,
      "shares_held": 20442000
    },
    {
      "FY": "FY15",
      "period": "2016/3",
      "rank": 5,
      "name": "鹿島社員持株会",
      "shareholding_ratio": 1.88,
      "shares_held": 19872000
    },
    {
      "FY": "FY15",
      "period": "2016/3",
      "rank": 6,
      "name": "日本トラスティ・サービス信託銀行株式会社(信託口９)",
      "shareholding_ratio": 1.64,
      "shares_held": 17326000
    },
    {
      "FY": "FY15",
      "period": "2016/3",
      "rank": 7,
      "name": "公益財団法人鹿島学術振興財団",
      "shareholding_ratio": 1.37,
      "shares_held": 14470000
    },
    {
      "FY": "FY15",
      "period": "2016/3",
      "rank": 8,
      "name": "石 川 ヨシ子",
      "shareholding_ratio": 1.35,
      "shares_held": 14292000
    },
    {
      "FY": "FY15",
      "period": "2016/3",
      "rank": 9,
      "name": "日本トラスティ・サービス信託銀行株式会社(信託口７)",
      "shareholding_ratio": 1.22,
      "shares_held": 12930000
    },
    {
      "FY": "FY15",
      "period": "2016/3",
      "rank": 10,
      "name": "大正製薬ホールディングス株式会社",
      "shareholding_ratio": 1.19,
      "shares_held": 12576000
    },
    {
      "FY": "FY16",
      "period": "2017/3",
      "rank": 1,
      "name": "日本マスタートラスト信託銀行株式会社(信託口)",
      "shareholding_ratio": 5.98,
      "shares_held": 63253000
    },
    {
      "FY": "FY16",
      "period": "2017/3",
      "rank": 2,
      "name": "日本トラスティ・サービス信託銀行株式会社(信託口)",
      "shareholding_ratio": 4.98,
      "shares_held": 52616000
    },
    {
      "FY": "FY16",
      "period": "2017/3",
      "rank": 3,
      "name": "鹿 島 昭 一",
      "shareholding_ratio": 2.99,
      "shares_held": 31585000
    },
    {
      "FY": "FY16",
      "period": "2017/3",
      "rank": 4,
      "name": "株式会社三井住友銀行",
      "shareholding_ratio": 1.93,
      "shares_held": 20442000
    },
    {
      "FY": "FY16",
      "period": "2017/3",
      "rank": 5,
      "name": "鹿島社員持株会",
      "shareholding_ratio": 1.74,
      "shares_held": 18445000
    },
    {
      "FY": "FY16",
      "period": "2017/3",
      "rank": 6,
      "name": "日本トラスティ・サービス信託銀行株式会社(信託口５)",
      "shareholding_ratio": 1.71,
      "shares_held": 18095000
    },
    {
      "FY": "FY16",
      "period": "2017/3",
      "rank": 7,
      "name": "ステート ストリート バンク ウェストクライアント トリーティー 505234(常任代理人 株式会社みずほ銀行)",
      "shareholding_ratio": 1.6,
      "shares_held": 16868000
    },
    {
      "FY": "FY16",
      "period": "2017/3",
      "rank": 8,
      "name": "公益財団法人鹿島学術振興財団",
      "shareholding_ratio": 1.37,
      "shares_held": 14470000
    },
    {
      "FY": "FY16",
      "period": "2017/3",
      "rank": 9,
      "name": "日本トラスティ・サービス信託銀行株式会社(信託口１)",
      "shareholding_ratio": 1.27,
      "shares_held": 13403000
    },
    {
      "FY": "FY16",
      "period": "2017/3",
      "rank": 10,
      "name": "日本トラスティ・サービス信託銀行株式会社(信託口２)",
      "shareholding_ratio": 1.25,
      "shares_held": 13255000
    },
    {
      "FY": "FY17",
      "period": "2018/3",
      "rank": 1,
      "name": "日本マスタートラスト信託銀行株式会社(信託口)",
      "shareholding_ratio": 6.48,
      "shares_held": 67379000
    },
    {
      "FY": "FY17",
      "period": "2018/3",
      "rank": 2,
      "name": "日本トラスティ・サービス信託銀行株式会社(信託口)",
      "shareholding_ratio": 4.29,
      "shares_held": 44592000
    },
    {
      "FY": "FY17",
      "period": "2018/3",
      "rank": 3,
      "name": "鹿 島 昭 一",
      "shareholding_ratio": 3.04,
      "shares_held": 31585000
    },
    {
      "FY": "FY17",
      "period": "2018/3",
      "rank": 4,
      "name": "ステート ストリート バンク ウェストクライアント トリーティー 505234(常任代理人 株式会社みずほ銀行決済営業部)",
      "shareholding_ratio": 2.08,
      "shares_held": 21621000
    },
    {
      "FY": "FY17",
      "period": "2018/3",
      "rank": 5,
      "name": "株式会社三井住友銀行",
      "shareholding_ratio": 1.97,
      "shares_held": 20442000
    },
    {
      "FY": "FY17",
      "period": "2018/3",
      "rank": 6,
      "name": "日本トラスティ・サービス信託銀行株式会社(信託口５)",
      "shareholding_ratio": 1.81,
      "shares_held": 18816000
    },
    {
      "FY": "FY17",
      "period": "2018/3",
      "rank": 7,
      "name": "日本トラスティ・サービス信託銀行株式会社(信託口７)",
      "shareholding_ratio": 1.65,
      "shares_held": 17136000
    },
    {
      "FY": "FY17",
      "period": "2018/3",
      "rank": 8,
      "name": "鹿島社員持株会",
      "shareholding_ratio": 1.6,
      "shares_held": 16664000
    },
    {
      "FY": "FY17",
      "period": "2018/3",
      "rank": 9,
      "name": "GOVERNMENT OF NORWAY(常任代理人 シティバンク、エヌ・エイ東京支店)",
      "shareholding_ratio": 1.48,
      "shares_held": 15345000
    },
    {
      "FY": "FY17",
      "period": "2018/3",
      "rank": 10,
      "name": "公益財団法人鹿島学術振興財団",
      "shareholding_ratio": 1.39,
      "shares_held": 14470000
    },
    {
      "FY": "FY18",
      "period": "2019/3",
      "rank": 1,
      "name": "日本マスタートラスト信託銀行株式会社(信託口)",
      "shareholding_ratio": 7.73,
      "shares_held": 40174000
    },
    {
      "FY": "FY18",
      "period": "2019/3",
      "rank": 2,
      "name": "日本トラスティ・サービス信託銀行株式会社(信託口)",
      "shareholding_ratio": 5.79,
      "shares_held": 30078000
    },
    {
      "FY": "FY18",
      "period": "2019/3",
      "rank": 3,
      "name": "鹿 島 昭 一",
      "shareholding_ratio": 3.04,
      "shares_held": 15792000
    },
    {
      "FY": "FY18",
      "period": "2019/3",
      "rank": 4,
      "name": "日本トラスティ・サービス信託銀行株式会社(信託口５)",
      "shareholding_ratio": 1.98,
      "shares_held": 10302000
    },
    {
      "FY": "FY18",
      "period": "2019/3",
      "rank": 5,
      "name": "日本トラスティ・サービス信託銀行株式会社(信託口９)",
      "shareholding_ratio": 1.87,
      "shares_held": 9742000
    },
    {
      "FY": "FY18",
      "period": "2019/3",
      "rank": 6,
      "name": "株式会社三井住友銀行",
      "shareholding_ratio": 1.83,
      "shares_held": 9508000
    },
    {
      "FY": "FY18",
      "period": "2019/3",
      "rank": 7,
      "name": "日本トラスティ・サービス信託銀行株式会社(信託口７)",
      "shareholding_ratio": 1.74,
      "shares_held": 9034000
    },
    {
      "FY": "FY18",
      "period": "2019/3",
      "rank": 8,
      "name": "鹿島社員持株会",
      "shareholding_ratio": 1.62,
      "shares_held": 8432000
    },
    {
      "FY": "FY18",
      "period": "2019/3",
      "rank": 9,
      "name": "公益財団法人鹿島学術振興財団",
      "shareholding_ratio": 1.39,
      "shares_held": 7235000
    },
    {
      "FY": "FY18",
      "period": "2019/3",
      "rank": 10,
      "name": "ジェーピー モルガン チェース バンク385151(常任代理人 株式会社みずほ銀行決済営業部)",
      "shareholding_ratio": 1.37,
      "shares_held": 7145000
    },
    {
      "FY": "FY19",
      "period": "2020/3",
      "rank": 1,
      "name": "日本マスタートラスト信託銀行株式会社(信託口)",
      "shareholding_ratio": 8.83,
      "shares_held": 45347000
    },
    {
      "FY": "FY19",
      "period": "2020/3",
      "rank": 2,
      "name": "日本トラスティ・サービス信託銀行株式会社(信託口)",
      "shareholding_ratio": 6.39,
      "shares_held": 32834000
    },
    {
      "FY": "FY19",
      "period": "2020/3",
      "rank": 3,
      "name": "鹿 島 昭 一",
      "shareholding_ratio": 3.08,
      "shares_held": 15792000
    },
    {
      "FY": "FY19",
      "period": "2020/3",
      "rank": 4,
      "name": "日本トラスティ・サービス信託銀行株式会社(信託口７)",
      "shareholding_ratio": 2.1,
      "shares_held": 10807000
    },
    {
      "FY": "FY19",
      "period": "2020/3",
      "rank": 5,
      "name": "日本トラスティ・サービス信託銀行株式会社(信託口９)",
      "shareholding_ratio": 2.1,
      "shares_held": 10791000
    },
    {
      "FY": "FY19",
      "period": "2020/3",
      "rank": 6,
      "name": "日本トラスティ・サービス信託銀行株式会社(信託口５)",
      "shareholding_ratio": 1.95,
      "shares_held": 10039000
    },
    {
      "FY": "FY19",
      "period": "2020/3",
      "rank": 7,
      "name": "株式会社三井住友銀行",
      "shareholding_ratio": 1.79,
      "shares_held": 9171000
    },
    {
      "FY": "FY19",
      "period": "2020/3",
      "rank": 8,
      "name": "鹿島社員持株会",
      "shareholding_ratio": 1.67,
      "shares_held": 8551000
    },
    {
      "FY": "FY19",
      "period": "2020/3",
      "rank": 9,
      "name": "ジェーピー モルガン チェース バンク385151(常任代理人 株式会社みずほ銀行決済営業部)",
      "shareholding_ratio": 1.55,
      "shares_held": 7967000
    },
    {
      "FY": "FY19",
      "period": "2020/3",
      "rank": 10,
      "name": "公益財団法人鹿島学術振興財団",
      "shareholding_ratio": 1.41,
      "shares_held": 7235000
    },
    {
      "FY": "FY20",
      "period": "2021/3",
      "rank": 1,
      "name": "日本マスタートラスト信託銀行株式会社(信託口)",
      "shareholding_ratio": 9.88,
      "shares_held": 50008000
    },
    {
      "FY": "FY20",
      "period": "2021/3",
      "rank": 2,
      "name": "株式会社日本カストディ銀行(信託口)",
      "shareholding_ratio": 5.79,
      "shares_held": 29325000
    },
    {
      "FY": "FY20",
      "period": "2021/3",
      "rank": 3,
      "name": "株式会社日本カストディ銀行(信託口７)",
      "shareholding_ratio": 2.21,
      "shares_held": 11168000
    },
    {
      "FY": "FY20",
      "period": "2021/3",
      "rank": 4,
      "name": "鹿 島 昭 一",
      "shareholding_ratio": 1.84,
      "shares_held": 9292000
    },
    {
      "FY": "FY20",
      "period": "2021/3",
      "rank": 5,
      "name": "鹿島社員持株会",
      "shareholding_ratio": 1.77,
      "shares_held": 8967000
    },
    {
      "FY": "FY20",
      "period": "2021/3",
      "rank": 6,
      "name": "株式会社三井住友銀行",
      "shareholding_ratio": 1.75,
      "shares_held": 8871000
    },
    {
      "FY": "FY20",
      "period": "2021/3",
      "rank": 7,
      "name": "ＪＰモルガン証券株式会社",
      "shareholding_ratio": 1.74,
      "shares_held": 8790000
    },
    {
      "FY": "FY20",
      "period": "2021/3",
      "rank": 8,
      "name": "公益財団法人鹿島学術振興財団",
      "shareholding_ratio": 1.43,
      "shares_held": 7235000
    },
    {
      "FY": "FY20",
      "period": "2021/3",
      "rank": 9,
      "name": "ステート ストリート バンク ウェストクライアント トリーティー 505234(常任代理人 株式会社みずほ銀行決済営業部)",
      "shareholding_ratio": 1.4,
      "shares_held": 7071000
    },
    {
      "FY": "FY20",
      "period": "2021/3",
      "rank": 10,
      "name": "株式会社日本カストディ銀行(信託口５)",
      "shareholding_ratio": 1.39,
      "shares_held": 7046000
    },
    {
      "FY": "FY21",
      "period": "2022/3",
      "rank": 1,
      "name": "日本マスタートラスト信託銀行株式会社(信託口)",
      "shareholding_ratio": 17.22,
      "shares_held": 84983000
    },
    {
      "FY": "FY21",
      "period": "2022/3",
      "rank": 2,
      "name": "株式会社日本カストディ銀行(信託口)",
      "shareholding_ratio": 5.53,
      "shares_held": 27293000
    },
    {
      "FY": "FY21",
      "period": "2022/3",
      "rank": 3,
      "name": "鹿 島 公 子",
      "shareholding_ratio": 3.21,
      "shares_held": 15849000
    },
    {
      "FY": "FY21",
      "period": "2022/3",
      "rank": 4,
      "name": "鹿島社員持株会",
      "shareholding_ratio": 1.89,
      "shares_held": 9347000
    },
    {
      "FY": "FY21",
      "period": "2022/3",
      "rank": 5,
      "name": "株式会社三井住友銀行",
      "shareholding_ratio": 1.8,
      "shares_held": 8871000
    },
    {
      "FY": "FY21",
      "period": "2022/3",
      "rank": 6,
      "name": "ステート ストリート バンク ウェストクライアント トリーティー 505234(常任代理人 株式会社みずほ銀行決済営業部)",
      "shareholding_ratio": 1.54,
      "shares_held": 7603000
    },
    {
      "FY": "FY21",
      "period": "2022/3",
      "rank": 7,
      "name": "公益財団法人鹿島学術振興財団",
      "shareholding_ratio": 1.47,
      "shares_held": 7235000
    },
    {
      "FY": "FY21",
      "period": "2022/3",
      "rank": 8,
      "name": "大正製薬ホールディングス株式会社",
      "shareholding_ratio": 1.27,
      "shares_held": 6288000
    },
    {
      "FY": "FY21",
      "period": "2022/3",
      "rank": 9,
      "name": "ゴールドマン・サックス証券株式会社 ＢＮＹＭ(常任代理人 株式会社三菱ＵＦＪ銀行)",
      "shareholding_ratio": 1.2,
      "shares_held": 5908000
    },
    {
      "FY": "FY21",
      "period": "2022/3",
      "rank": 10,
      "name": "渥 美 伊都子",
      "shareholding_ratio": 1.18,
      "shares_held": 5817000
    },
    {
      "FY": "FY22",
      "period": "2023/3",
      "rank": 1,
      "name": "日本マスタートラスト信託銀行株式会社(信託口)",
      "shareholding_ratio": 15.91,
      "shares_held": 77499000
    },
    {
      "FY": "FY22",
      "period": "2023/3",
      "rank": 2,
      "name": "株式会社日本カストディ銀行(信託口)",
      "shareholding_ratio": 7.37,
      "shares_held": 35876000
    },
    {
      "FY": "FY22",
      "period": "2023/3",
      "rank": 3,
      "name": "鹿 島 公 子",
      "shareholding_ratio": 3.25,
      "shares_held": 15849000
    },
    {
      "FY": "FY22",
      "period": "2023/3",
      "rank": 4,
      "name": "鹿島社員持株会",
      "shareholding_ratio": 2,
      "shares_held": 9747000
    },
    {
      "FY": "FY22",
      "period": "2023/3",
      "rank": 5,
      "name": "ＪＰモルガン証券株式会社",
      "shareholding_ratio": 1.91,
      "shares_held": 9282000
    },
    {
      "FY": "FY22",
      "period": "2023/3",
      "rank": 6,
      "name": "株式会社三井住友銀行",
      "shareholding_ratio": 1.71,
      "shares_held": 8331000
    },
    {
      "FY": "FY22",
      "period": "2023/3",
      "rank": 7,
      "name": "公益財団法人鹿島学術振興財団",
      "shareholding_ratio": 1.49,
      "shares_held": 7235000
    },
    {
      "FY": "FY22",
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      "period": "1961/11",
      "company_name_at_period": "鹿島建設",
      "rank": 8,
      "name": "小野威",
      "shareholding_ratio": 1.06,
      "shares_held": 848000,
      "total_shares": 80000000,
      "source": "株式会社年鑑 昭和38年版"
    },
    {
      "FY": "FY61",
      "period": "1961/11",
      "company_name_at_period": "鹿島建設",
      "rank": 9,
      "name": "渡辺喜三郎",
      "shareholding_ratio": 0.96,
      "shares_held": 765000,
      "total_shares": 80000000,
      "source": "株式会社年鑑 昭和38年版"
    },
    {
      "FY": "FY61",
      "period": "1961/11",
      "company_name_at_period": "鹿島建設",
      "rank": 10,
      "name": "石川よし子",
      "shareholding_ratio": 0.96,
      "shares_held": 765000,
      "total_shares": 80000000,
      "source": "株式会社年鑑 昭和38年版"
    }
  ]
}