{
  "spec_version": "5",
  "endpoint": "ceo-person",
  "stock_code": "5445",
  "company_name": "東京鐵鋼",
  "content_lang": "ja",
  "meta_lang": "en",
  "canonical_url": "https://the-shashi.com/tse/5445/executives/ceo/yoshihara-tsunebumi/",
  "api_url": "/api/5445/ceo/yoshihara-tsunebumi.json",
  "updated": "2026-10-26",
  "license": "© 2026 Yutaka Sugiura. All rights reserved.",
  "attribution": "The社史 (the-shashi.com) — https://the-shashi.com/tse/5445/executives/ceo/yoshihara-tsunebumi/",
  "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": "yoshihara-tsunebumi",
    "name": "吉原毎文",
    "kana": "よしはら　つねぶみ",
    "surname": "吉原",
    "given_name": "毎文",
    "hometown": null,
    "education": null,
    "prev_role": null,
    "career": [
      {
        "company": "東京鐵鋼",
        "from": "1973-05",
        "to": null,
        "roles": [
          {
            "date": "1973-05",
            "role": "入社",
            "event": "入社"
          },
          {
            "date": "1976-01",
            "role": "営業部長",
            "dept": "営業部長"
          },
          {
            "date": "1981-02",
            "role": "取締役営業部長就任",
            "board": "取締役",
            "dept": "営業部長",
            "event": "就任"
          },
          {
            "date": "1985-02",
            "role": "常務取締役営業本部長就任",
            "board": "取締役",
            "title": "常務",
            "dept": "営業本部長",
            "event": "就任"
          },
          {
            "date": "1988-06",
            "role": "代表取締役副社長就任",
            "board": "代表取締役",
            "title": "副社長",
            "event": "就任"
          },
          {
            "date": "1992-06",
            "role": "代表取締役社長就任",
            "board": "代表取締役",
            "title": "社長",
            "event": "就任",
            "is_ceo_appointed": true
          },
          {
            "date": "2024-06",
            "role": "代表取締役会長、最高経営責任者(CEO)就任(現) (重要な兼職の状況) (公財)吉原育英会理事長"
          }
        ]
      }
    ],
    "references": [
      {
        "source": "東京鐵鋼 定時株主総会招集通知（2026年5月・取締役候補者のふりがな）",
        "url": null,
        "for": [
          "kana"
        ]
      }
    ],
    "html_url": "https://the-shashi.com/tse/5445/executives/ceo/yoshihara-tsunebumi/",
    "term_start": "1992-06",
    "term_end": "2024-06",
    "api_url": "https://the-shashi.com/api/5445/ceo/yoshihara-tsunebumi.json",
    "list_api_url": "https://the-shashi.com/api/5445/ceo.json",
    "predecessor": null,
    "successor": {
      "slug": "yoshihara-hidetaka",
      "name": "吉原栄孝",
      "api_url": "https://the-shashi.com/api/5445/ceo/yoshihara-hidetaka.json"
    }
  }
}