{
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      "company_name_at_period": "三共",
      "rank": 1,
      "name": "大和銀行(東京)",
      "shareholding_ratio": null,
      "shares_held": 1165000,
      "total_shares": 10400000,
      "source": "株式会社年鑑 昭和31年版"
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    {
      "FY": "FY55",
      "period": "1955/9",
      "company_name_at_period": "三共",
      "rank": 2,
      "name": "日本生命",
      "shareholding_ratio": null,
      "shares_held": 400000,
      "total_shares": 10400000,
      "source": "株式会社年鑑 昭和31年版"
    },
    {
      "FY": "FY55",
      "period": "1955/9",
      "company_name_at_period": "三共",
      "rank": 3,
      "name": "住友信託(東京)",
      "shareholding_ratio": null,
      "shares_held": 394000,
      "total_shares": 10400000,
      "source": "株式会社年鑑 昭和31年版"
    },
    {
      "FY": "FY55",
      "period": "1955/9",
      "company_name_at_period": "三共",
      "rank": 4,
      "name": "野村証券",
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      "shares_held": 341200,
      "total_shares": 10400000,
      "source": "株式会社年鑑 昭和31年版"
    },
    {
      "FY": "FY55",
      "period": "1955/9",
      "company_name_at_period": "三共",
      "rank": 5,
      "name": "塩原千代",
      "shareholding_ratio": null,
      "shares_held": 167800,
      "total_shares": 10400000,
      "source": "株式会社年鑑 昭和31年版"
    },
    {
      "FY": "FY55",
      "period": "1955/9",
      "company_name_at_period": "三共",
      "rank": 6,
      "name": "大東京火災海上",
      "shareholding_ratio": null,
      "shares_held": 160000,
      "total_shares": 10400000,
      "source": "株式会社年鑑 昭和31年版"
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    {
      "FY": "FY55",
      "period": "1955/9",
      "company_name_at_period": "三共",
      "rank": 7,
      "name": "第一生命",
      "shareholding_ratio": null,
      "shares_held": 157900,
      "total_shares": 10400000,
      "source": "株式会社年鑑 昭和31年版"
    },
    {
      "FY": "FY55",
      "period": "1955/9",
      "company_name_at_period": "三共",
      "rank": 8,
      "name": "日本証券金融",
      "shareholding_ratio": null,
      "shares_held": 155100,
      "total_shares": 10400000,
      "source": "株式会社年鑑 昭和31年版"
    },
    {
      "FY": "FY55",
      "period": "1955/9",
      "company_name_at_period": "三共",
      "rank": 9,
      "name": "日本勧業銀行",
      "shareholding_ratio": null,
      "shares_held": 150000,
      "total_shares": 10400000,
      "source": "株式会社年鑑 昭和31年版"
    },
    {
      "FY": "FY55",
      "period": "1955/9",
      "company_name_at_period": "三共",
      "rank": 10,
      "name": "三菱信託",
      "shareholding_ratio": null,
      "shares_held": 148404,
      "total_shares": 10400000,
      "source": "株式会社年鑑 昭和31年版"
    },
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      "FY": "FY60",
      "period": "1961/3",
      "company_name_at_period": "三共",
      "rank": 1,
      "name": "三菱信託銀行",
      "shareholding_ratio": 10.7,
      "shares_held": 2827000,
      "total_shares": 26400000,
      "source": "株式会社年鑑 昭和37年版"
    },
    {
      "FY": "FY60",
      "period": "1961/3",
      "company_name_at_period": "三共",
      "rank": 2,
      "name": "東洋信託銀行",
      "shareholding_ratio": 6.9,
      "shares_held": 1830000,
      "total_shares": 26400000,
      "source": "株式会社年鑑 昭和37年版"
    },
    {
      "FY": "FY60",
      "period": "1961/3",
      "company_name_at_period": "三共",
      "rank": 3,
      "name": "住友信託銀行",
      "shareholding_ratio": 5.8,
      "shares_held": 1538000,
      "total_shares": 26400000,
      "source": "株式会社年鑑 昭和37年版"
    },
    {
      "FY": "FY60",
      "period": "1961/3",
      "company_name_at_period": "三共",
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      "name": "三井信託銀行",
      "shareholding_ratio": 5.2,
      "shares_held": 1380000,
      "total_shares": 26400000,
      "source": "株式会社年鑑 昭和37年版"
    },
    {
      "FY": "FY60",
      "period": "1961/3",
      "company_name_at_period": "三共",
      "rank": 5,
      "name": "日本生命",
      "shareholding_ratio": 4.1,
      "shares_held": 1070000,
      "total_shares": 26400000,
      "source": "株式会社年鑑 昭和37年版"
    },
    {
      "FY": "FY60",
      "period": "1961/3",
      "company_name_at_period": "三共",
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      "name": "日本証券金融",
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      "shares_held": 637000,
      "total_shares": 26400000,
      "source": "株式会社年鑑 昭和37年版"
    },
    {
      "FY": "FY60",
      "period": "1961/3",
      "company_name_at_period": "三共",
      "rank": 7,
      "name": "大和銀行",
      "shareholding_ratio": 2,
      "shares_held": 535000,
      "total_shares": 26400000,
      "source": "株式会社年鑑 昭和37年版"
    },
    {
      "FY": "FY60",
      "period": "1961/3",
      "company_name_at_period": "三共",
      "rank": 8,
      "name": "朝日生命",
      "shareholding_ratio": 1.9,
      "shares_held": 495000,
      "total_shares": 26400000,
      "source": "株式会社年鑑 昭和37年版"
    },
    {
      "FY": "FY60",
      "period": "1961/3",
      "company_name_at_period": "三共",
      "rank": 9,
      "name": "大東京火災海上",
      "shareholding_ratio": 1.6,
      "shares_held": 429000,
      "total_shares": 26400000,
      "source": "株式会社年鑑 昭和37年版"
    },
    {
      "FY": "FY60",
      "period": "1961/3",
      "company_name_at_period": "三共",
      "rank": 10,
      "name": "第一生命",
      "shareholding_ratio": 1.5,
      "shares_held": 390000,
      "total_shares": 26400000,
      "source": "株式会社年鑑 昭和37年版"
    },
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      "FY": "FY74",
      "period": "1975/3",
      "company_name_at_period": "三共",
      "rank": 1,
      "name": "日本生命保険",
      "shareholding_ratio": 8.93,
      "shares_held": 14780500,
      "total_shares": 165500000,
      "source": "日本企業要覧 1975年版"
    },
    {
      "FY": "FY74",
      "period": "1975/3",
      "company_name_at_period": "三共",
      "rank": 2,
      "name": "第一勧業銀行",
      "shareholding_ratio": 3.41,
      "shares_held": 5639296,
      "total_shares": 165500000,
      "source": "日本企業要覧 1975年版"
    },
    {
      "FY": "FY74",
      "period": "1975/3",
      "company_name_at_period": "三共",
      "rank": 3,
      "name": "朝日生命保険",
      "shareholding_ratio": 2.76,
      "shares_held": 4567000,
      "total_shares": 165500000,
      "source": "日本企業要覧 1975年版"
    },
    {
      "FY": "FY74",
      "period": "1975/3",
      "company_name_at_period": "三共",
      "rank": 4,
      "name": "第一生命保険",
      "shareholding_ratio": 2.36,
      "shares_held": 3905000,
      "total_shares": 165500000,
      "source": "日本企業要覧 1975年版"
    },
    {
      "FY": "FY74",
      "period": "1975/3",
      "company_name_at_period": "三共",
      "rank": 5,
      "name": "三井信託銀行",
      "shareholding_ratio": 1.98,
      "shares_held": 3274718,
      "total_shares": 165500000,
      "source": "日本企業要覧 1975年版"
    },
    {
      "FY": "FY74",
      "period": "1975/3",
      "company_name_at_period": "三共",
      "rank": 6,
      "name": "静岡銀行",
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      "shares_held": 2591617,
      "total_shares": 165500000,
      "source": "日本企業要覧 1975年版"
    },
    {
      "FY": "FY74",
      "period": "1975/3",
      "company_name_at_period": "三共",
      "rank": 7,
      "name": "大東京火災海上保険",
      "shareholding_ratio": 1.5,
      "shares_held": 2483577,
      "total_shares": 165500000,
      "source": "日本企業要覧 1975年版"
    },
    {
      "FY": "FY74",
      "period": "1975/3",
      "company_name_at_period": "三共",
      "rank": 8,
      "name": "三井銀行",
      "shareholding_ratio": 1.31,
      "shares_held": 2162286,
      "total_shares": 165500000,
      "source": "日本企業要覧 1975年版"
    },
    {
      "FY": "FY74",
      "period": "1975/3",
      "company_name_at_period": "三共",
      "rank": 9,
      "name": "日本証券金融",
      "shareholding_ratio": 1.28,
      "shares_held": 2114525,
      "total_shares": 165500000,
      "source": "日本企業要覧 1975年版"
    },
    {
      "FY": "FY74",
      "period": "1975/3",
      "company_name_at_period": "三共",
      "rank": 10,
      "name": "相互タクシー",
      "shareholding_ratio": 1.26,
      "shares_held": 2080722,
      "total_shares": 165500000,
      "source": "日本企業要覧 1975年版"
    },
    {
      "FY": "FY79",
      "period": "1980/3",
      "company_name_at_period": "三共",
      "rank": 1,
      "name": "日本生命保険",
      "shareholding_ratio": 7.26,
      "shares_held": 12020000,
      "total_shares": 165600000,
      "source": "企業系列総覧 1981年版"
    },
    {
      "FY": "FY79",
      "period": "1980/3",
      "company_name_at_period": "三共",
      "rank": 2,
      "name": "第一勧業銀行",
      "shareholding_ratio": 4.61,
      "shares_held": 7639000,
      "total_shares": 165600000,
      "source": "企業系列総覧 1981年版"
    },
    {
      "FY": "FY79",
      "period": "1980/3",
      "company_name_at_period": "三共",
      "rank": 3,
      "name": "三菱信託銀行",
      "shareholding_ratio": 2.85,
      "shares_held": 4718000,
      "total_shares": 165600000,
      "source": "企業系列総覧 1981年版"
    },
    {
      "FY": "FY79",
      "period": "1980/3",
      "company_name_at_period": "三共",
      "rank": 4,
      "name": "住友信託東京",
      "shareholding_ratio": 2.42,
      "shares_held": 4000000,
      "total_shares": 165600000,
      "source": "企業系列総覧 1981年版"
    },
    {
      "FY": "FY79",
      "period": "1980/3",
      "company_name_at_period": "三共",
      "rank": 5,
      "name": "三井信託銀行",
      "shareholding_ratio": 2.3,
      "shares_held": 3816000,
      "total_shares": 165600000,
      "source": "企業系列総覧 1981年版"
    },
    {
      "FY": "FY79",
      "period": "1980/3",
      "company_name_at_period": "三共",
      "rank": 6,
      "name": "静岡銀行",
      "shareholding_ratio": 2.29,
      "shares_held": 3791000,
      "total_shares": 165600000,
      "source": "企業系列総覧 1981年版"
    },
    {
      "FY": "FY79",
      "period": "1980/3",
      "company_name_at_period": "三共",
      "rank": 7,
      "name": "三井銀行",
      "shareholding_ratio": 1.91,
      "shares_held": 3162000,
      "total_shares": 165600000,
      "source": "企業系列総覧 1981年版"
    },
    {
      "FY": "FY79",
      "period": "1980/3",
      "company_name_at_period": "三共",
      "rank": 8,
      "name": "朝日生命保険",
      "shareholding_ratio": 1.9,
      "shares_held": 3139000,
      "total_shares": 165600000,
      "source": "企業系列総覧 1981年版"
    },
    {
      "FY": "FY79",
      "period": "1980/3",
      "company_name_at_period": "三共",
      "rank": 9,
      "name": "大和證券",
      "shareholding_ratio": 1.82,
      "shares_held": 3022000,
      "total_shares": 165600000,
      "source": "企業系列総覧 1981年版"
    },
    {
      "FY": "FY79",
      "period": "1980/3",
      "company_name_at_period": "三共",
      "rank": 10,
      "name": "呉羽化学工業",
      "shareholding_ratio": 1.81,
      "shares_held": 3000000,
      "total_shares": 165600000,
      "source": "企業系列総覧 1981年版"
    }
  ]
}
