{
  "spec_version": "5",
  "endpoint": "ceo-person",
  "stock_code": "vodafone-jp",
  "company_name": "ボーダフォン",
  "content_lang": "ja",
  "meta_lang": "en",
  "canonical_url": "https://the-shashi.com/tse/vodafone-jp/executives/ceo/sakata-koichi/",
  "api_url": "/api/vodafone-jp/ceo/sakata-koichi.json",
  "updated": "2026-10-27",
  "license": "© 2026 Yutaka Sugiura. All rights reserved.",
  "attribution": "The社史 (the-shashi.com) — https://the-shashi.com/tse/vodafone-jp/executives/ceo/sakata-koichi/",
  "source": {
    "person": {
      "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"
    }
  },
  "person": {
    "slug": "sakata-koichi",
    "name": "坂田浩一",
    "kana": "さかた　こういち",
    "birthdate": "1928-03-05",
    "hometown": null,
    "education": "早稲田大学理工学部機械工学科 (1951)",
    "prev_role": "日本国有鉄道 技師長",
    "prev_company": "日本国有鉄道",
    "origin": "生え抜き（1951年日本国有鉄道入社）。車両の技術者として岡山鉄道管理局長・工作局長・技師長を歩み、国鉄の自営通信網を引き継ぐ鉄道通信の設立と同時に初代社長へ",
    "origin_type": "生え抜き",
    "milestone": "鉄道通信の初代社長。旧日本テレコム・日本国際通信との2度の合併を率いた",
    "career": [
      {
        "company": "日本国有鉄道",
        "from": "1951",
        "to": "1986-12",
        "roles": [
          {
            "date": "1951",
            "role": "入社"
          },
          {
            "date": "1976",
            "role": "岡山鉄道管理局長"
          },
          {
            "date": "1979",
            "role": "工作局長"
          },
          {
            "date": "1985-06",
            "role": "技師長"
          }
        ]
      },
      {
        "company": "日本テレコム",
        "from": "1986-12",
        "to": null,
        "roles": [
          {
            "date": "1986-12",
            "role": "取締役社長（鉄道通信）",
            "is_ceo_appointed": true
          },
          {
            "date": "1989-05",
            "role": "旧日本テレコムを合併し商号を日本テレコムに変更"
          },
          {
            "date": "1998-06",
            "role": "取締役会長"
          },
          {
            "date": "1998-06",
            "role": "社長退任",
            "is_ceo_retired": true,
            "retirement_basis": "press"
          },
          {
            "date": "2004-06",
            "role": "名誉顧問"
          }
        ]
      }
    ],
    "references": [
      {
        "source": "日経ビジネス 2001年3月26日号「国際再編を先導する通信業界のご意見番 坂田浩一氏［日本テレコム会長］」",
        "for": [
          "career",
          "education",
          "birthdate"
        ]
      },
      {
        "source": "TAC report 13(4) 1997年12月「日本テレコム(株)社長 坂田浩一氏に聞く」",
        "for": [
          "career"
        ]
      },
      {
        "source": "証券 46巻11号 1994年「新規上場会社紹介 日本テレコム株式会社」",
        "for": [
          "career"
        ]
      }
    ],
    "html_url": "https://the-shashi.com/tse/vodafone-jp/executives/ceo/sakata-koichi/",
    "term_start": "1986-12",
    "term_end": "1998-06",
    "api_url": "https://the-shashi.com/api/vodafone-jp/ceo/sakata-koichi.json",
    "list_api_url": "https://the-shashi.com/api/vodafone-jp/ceo.json",
    "predecessor": null,
    "successor": {
      "slug": "murakami-haruo",
      "name": "村上春雄",
      "api_url": "https://the-shashi.com/api/vodafone-jp/ceo/murakami-haruo.json"
    }
  }
}