{
  "spec_version": "6",
  "endpoint": "ceo-person",
  "stock_code": "9503",
  "company_name": "関西電力",
  "content_lang": "ja",
  "meta_lang": "en",
  "canonical_url": "https://the-shashi.com/tse/9503/executives/ceo/otagaki-shiro/",
  "api_url": "/api/9503/ceo/otagaki-shiro.json",
  "updated": "2026-11-12",
  "license": "© 2026 Yutaka Sugiura. All rights reserved.",
  "attribution": "The社史 (the-shashi.com) — https://the-shashi.com/tse/9503/executives/ceo/otagaki-shiro/",
  "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": "otagaki-shiro",
    "name": "太田垣士郎",
    "kana": "おおたがき　しろう",
    "surname": "太田垣",
    "given_name": "士郎",
    "origin": "外部出身（1946年12月から京阪神急行電鉄社長）。1951年5月の電気事業再編成で発足した関西電力の初代社長に就任",
    "origin_type": "外部出身",
    "hometown": "兵庫県城崎郡城崎町（現・豊岡市）",
    "prev_role": "京阪神急行電鉄 取締役社長",
    "career": [
      {
        "company": "京阪神急行電鉄",
        "from": "1943-10",
        "to": "1951-02",
        "roles": [
          {
            "date": "1943-10",
            "role": "取締役"
          },
          {
            "date": "1946-12",
            "role": "取締役社長"
          },
          {
            "date": "1951-02",
            "role": "取締役社長辞任"
          }
        ]
      },
      {
        "company": "関西配電",
        "from": "1946-11",
        "to": "1951-05",
        "roles": [
          {
            "date": "1946-11",
            "role": "監査役"
          },
          {
            "date": "1949-11",
            "role": "取締役"
          },
          {
            "date": "1951-05",
            "role": "取締役辞任"
          }
        ]
      },
      {
        "company": "新日本放送",
        "from": "1950-12",
        "to": "1951-03",
        "roles": [
          {
            "date": "1950-12",
            "role": "取締役"
          },
          {
            "date": "1951-03",
            "role": "取締役辞任"
          }
        ]
      },
      {
        "company": "関西電力株式会社",
        "from": "1951-05",
        "to": null,
        "roles": [
          {
            "date": "1951-05",
            "role": "取締役社長",
            "board": "取締役",
            "title": "社長",
            "is_ceo_appointed": true
          },
          {
            "date": "1959-11",
            "role": "社長退任（次期社長登用による推定）",
            "title": "社長",
            "event": "退任",
            "estimated": true,
            "is_ceo_retired": true,
            "retirement_basis": "next_ceo"
          }
        ]
      }
    ],
    "references": [
      {
        "source": "日本企業要覧 1962年版【役員の略歴】",
        "url": null,
        "for": [
          "career"
        ]
      }
    ],
    "html_url": "https://the-shashi.com/tse/9503/executives/ceo/otagaki-shiro/",
    "term_start": "1951-05",
    "term_end": "1959-11",
    "api_url": "https://the-shashi.com/api/9503/ceo/otagaki-shiro.json",
    "list_api_url": "https://the-shashi.com/api/9503/ceo.json",
    "predecessor": null,
    "successor": {
      "slug": "ashihara-yoshishige",
      "name": "芦原義重",
      "api_url": "https://the-shashi.com/api/9503/ceo/ashihara-yoshishige.json"
    }
  }
}