{
  "spec_version": "4",
  "endpoint": "ceo",
  "stock_code": "jnr",
  "company_name": "日本国有鉄道",
  "content_lang": "ja",
  "meta_lang": "en",
  "canonical_url": "https://the-shashi.com/tse/jnr/ceo/",
  "api_url": "/api/jnr/ceo.json",
  "updated": "2026-09-26",
  "license": "© 2026 Yutaka Sugiura. All rights reserved.",
  "attribution": "The社史 (the-shashi.com) — https://the-shashi.com/tse/jnr/ceo/",
  "source": {
    "ceo": {
      "primary": [
        "有価証券報告書（役員の状況）"
      ],
      "extraction": "EDINET の XBRL から機械抽出した役員表を土台に、雑誌記事・社史・報道で経歴と出自を補完",
      "caveat": "在任区間は career の is_ceo_appointed が正本。退任年月は次の代の就任年月から決まる"
    }
  },
  "count": 10,
  "ceo": [
    {
      "slug": "shimoyama-sadanori",
      "name": "下山定則",
      "kana": "しもやま　さだのり",
      "origin": "初代総裁。公共企業体としての発足と同日に就任し、定員法にもとづく9万5018人の人員整理を指揮した",
      "origin_type": null,
      "career": [
        {
          "company": "日本国有鉄道",
          "from": "1949-06",
          "to": "1949-09",
          "roles": [
            {
              "date": "1949-06",
              "role": "総裁",
              "is_ceo_appointed": true
            },
            {
              "date": "1949-09",
              "role": "総裁退任",
              "is_ceo_retired": true,
              "retirement_basis": "next_ceo"
            }
          ]
        }
      ],
      "html_url": "https://the-shashi.com/tse/jnr/executives/ceo/shimoyama-sadanori/",
      "term_start": "1949-06",
      "term_end": "1949-09"
    },
    {
      "slug": "kagayama-yukio",
      "name": "加賀山之雄",
      "kana": "かがやま　ゆきお",
      "origin": "第2代総裁",
      "origin_type": null,
      "career": [
        {
          "company": "日本国有鉄道",
          "from": "1949-09",
          "to": "1951-08",
          "roles": [
            {
              "date": "1949-09",
              "role": "総裁",
              "is_ceo_appointed": true
            },
            {
              "date": "1951-08",
              "role": "総裁退任",
              "is_ceo_retired": true,
              "retirement_basis": "next_ceo"
            }
          ]
        }
      ],
      "html_url": "https://the-shashi.com/tse/jnr/executives/ceo/kagayama-yukio/",
      "term_start": "1949-09",
      "term_end": "1951-08"
    },
    {
      "slug": "nagasaki-sonosuke",
      "name": "長崎惣之助",
      "kana": "ながさき　そうのすけ",
      "origin": "第3代総裁",
      "origin_type": null,
      "career": [
        {
          "company": "日本国有鉄道",
          "from": "1951-08",
          "to": "1955-05",
          "roles": [
            {
              "date": "1951-08",
              "role": "総裁",
              "is_ceo_appointed": true
            },
            {
              "date": "1955-05",
              "role": "総裁退任",
              "is_ceo_retired": true,
              "retirement_basis": "next_ceo"
            }
          ]
        }
      ],
      "html_url": "https://the-shashi.com/tse/jnr/executives/ceo/nagasaki-sonosuke/",
      "term_start": "1951-08",
      "term_end": "1955-05"
    },
    {
      "slug": "sogo-shinji",
      "name": "十河信二",
      "kana": "そごう　しんじ",
      "origin": "第4代総裁。在任8年は歴代最長。東海道新幹線の建設を決断し、着工にこぎつけた",
      "origin_type": null,
      "career": [
        {
          "company": "日本国有鉄道",
          "from": "1955-05",
          "to": "1963-05",
          "roles": [
            {
              "date": "1955-05",
              "role": "総裁",
              "is_ceo_appointed": true
            },
            {
              "date": "1963-05",
              "role": "総裁退任",
              "is_ceo_retired": true,
              "retirement_basis": "next_ceo"
            }
          ]
        }
      ],
      "html_url": "https://the-shashi.com/tse/jnr/executives/ceo/sogo-shinji/",
      "term_start": "1955-05",
      "term_end": "1963-05"
    },
    {
      "slug": "ishida-reisuke",
      "name": "石田禮助",
      "kana": "いしだ　れいすけ",
      "origin": "第5代総裁。総裁就任前は監査委員会の初代委員長を務めた",
      "origin_type": null,
      "career": [
        {
          "company": "日本国有鉄道",
          "from": "1963-05",
          "to": "1969-05",
          "roles": [
            {
              "date": "1963-05",
              "role": "総裁",
              "is_ceo_appointed": true
            },
            {
              "date": "1969-05",
              "role": "総裁退任",
              "is_ceo_retired": true,
              "retirement_basis": "next_ceo"
            }
          ]
        }
      ],
      "html_url": "https://the-shashi.com/tse/jnr/executives/ceo/ishida-reisuke/",
      "term_start": "1963-05",
      "term_end": "1969-05"
    },
    {
      "slug": "isozaki-satoshi",
      "name": "磯崎叡",
      "kana": "いそざき　さとし",
      "origin": "第6代総裁。財政再建の柱として生産性向上運動を進めたが、公労委が不当労働行為と認定して救済命令を受諾した",
      "origin_type": null,
      "career": [
        {
          "company": "日本国有鉄道",
          "from": "1969-05",
          "to": "1973-09",
          "roles": [
            {
              "date": "1969-05",
              "role": "総裁",
              "is_ceo_appointed": true
            },
            {
              "date": "1973-09",
              "role": "総裁退任",
              "is_ceo_retired": true,
              "retirement_basis": "next_ceo"
            }
          ]
        }
      ],
      "html_url": "https://the-shashi.com/tse/jnr/executives/ceo/isozaki-satoshi/",
      "term_start": "1969-05",
      "term_end": "1973-09"
    },
    {
      "slug": "fujii-matsutaro",
      "name": "藤井松太郎",
      "kana": "ふじい　まつたろう",
      "origin": "第7代総裁。順法闘争の激化と上尾事件のさなかに就任した",
      "origin_type": null,
      "career": [
        {
          "company": "日本国有鉄道",
          "from": "1973-09",
          "to": "1976-03",
          "roles": [
            {
              "date": "1973-09",
              "role": "総裁",
              "is_ceo_appointed": true
            },
            {
              "date": "1976-03",
              "role": "総裁退任",
              "is_ceo_retired": true,
              "retirement_basis": "next_ceo"
            }
          ]
        }
      ],
      "html_url": "https://the-shashi.com/tse/jnr/executives/ceo/fujii-matsutaro/",
      "term_start": "1973-09",
      "term_end": "1976-03"
    },
    {
      "slug": "takagi-fumio",
      "name": "高木文雄",
      "kana": "たかぎ　ふみお",
      "origin": "第8代総裁。前大蔵事務次官。在任中に長期債務残高が10兆円を超え、経営再建促進特別措置法による再建計画が始まった",
      "origin_type": null,
      "prev_role": "大蔵事務次官",
      "career": [
        {
          "company": "日本国有鉄道",
          "from": "1976-03",
          "to": "1983-12",
          "roles": [
            {
              "date": "1976-03",
              "role": "総裁",
              "is_ceo_appointed": true
            },
            {
              "date": "1983-12",
              "role": "総裁退任",
              "is_ceo_retired": true,
              "retirement_basis": "next_ceo"
            }
          ]
        }
      ],
      "html_url": "https://the-shashi.com/tse/jnr/executives/ceo/takagi-fumio/",
      "term_start": "1976-03",
      "term_end": "1983-12"
    },
    {
      "slug": "nisugi-iwao",
      "name": "仁杉巌",
      "kana": "にすぎ　いわお",
      "origin": "第9代総裁。前鉄道建設公団総裁。在任中の昭和59年度に単年度純損失が1兆6504億円へ拡大した",
      "origin_type": null,
      "prev_role": "鉄道建設公団総裁",
      "career": [
        {
          "company": "日本国有鉄道",
          "from": "1983-12",
          "to": "1985-06",
          "roles": [
            {
              "date": "1983-12",
              "role": "総裁",
              "is_ceo_appointed": true
            },
            {
              "date": "1985-06",
              "role": "総裁退任",
              "is_ceo_retired": true,
              "retirement_basis": "next_ceo"
            }
          ]
        }
      ],
      "html_url": "https://the-shashi.com/tse/jnr/executives/ceo/nisugi-iwao/",
      "term_start": "1983-12",
      "term_end": "1985-06"
    },
    {
      "slug": "sugiura-takaya",
      "name": "杉浦喬也",
      "kana": "すぎうら　たかや",
      "origin": "第10代・最後の総裁。前運輸事務次官。分割民営化を実行し、38年の歴史に幕を引いた",
      "origin_type": null,
      "prev_role": "運輸事務次官",
      "career": [
        {
          "company": "日本国有鉄道",
          "from": "1985-06",
          "to": "1987-03",
          "roles": [
            {
              "date": "1985-06",
              "role": "総裁",
              "is_ceo_appointed": true
            },
            {
              "date": "1987-03",
              "role": "分割民営化により解散",
              "is_ceo_retired": true
            }
          ]
        }
      ],
      "html_url": "https://the-shashi.com/tse/jnr/executives/ceo/sugiura-takaya/",
      "term_start": "1985-06",
      "term_end": "1987-03"
    }
  ]
}
