{
  "spec_version": "6",
  "endpoint": "ceo-person",
  "stock_code": "4183",
  "company_name": "三井化学",
  "content_lang": "ja",
  "meta_lang": "en",
  "canonical_url": "https://the-shashi.com/tse/4183/executives/ceo/fujiyoshi-kenji/",
  "api_url": "/api/4183/ceo/fujiyoshi-kenji.json",
  "updated": "2026-10-29",
  "license": "© 2026 Yutaka Sugiura. All rights reserved.",
  "attribution": "The社史 (the-shashi.com) — https://the-shashi.com/tse/4183/executives/ceo/fujiyoshi-kenji/",
  "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": "fujiyoshi-kenji",
    "name": "藤吉建二",
    "kana": "ふじよし　けんじ",
    "surname": "藤吉",
    "given_name": "建二",
    "origin": "生え抜き（1969年三井石油化学工業入社）。生産技術研究所長・研究開発本部を歩んだ研究畑出身で、S計画準備室長として構造改革を担当した後に社長へ",
    "origin_type": "生え抜き",
    "hometown": "滋賀県",
    "education": "京都大学大学院工学研究科修士課程修了 (1969)",
    "prev_role": "専務取締役",
    "career": [
      {
        "company": "三井石油化学工業",
        "from": "1969-04",
        "to": "1997-10",
        "roles": [
          {
            "date": "1969-04",
            "role": "入社",
            "event": "入社"
          },
          {
            "date": "1995-06",
            "role": "生産技術研究所長",
            "dept": "生産技術研究所長"
          }
        ]
      },
      {
        "company": "三井化学",
        "from": "1997-06",
        "to": null,
        "roles": [
          {
            "date": "1997-06",
            "role": "取締役",
            "board": "取締役"
          },
          {
            "date": "1997-10",
            "role": "取締役研究開発本部基礎石化研究開発センター長",
            "board": "取締役",
            "dept": "研究開発本部基礎石化研究開発センター長"
          },
          {
            "date": "1999-06",
            "role": "取締役研究開発本部研究開発管理部長",
            "board": "取締役",
            "dept": "研究開発本部研究開発管理部長"
          },
          {
            "date": "2001-06",
            "role": "常務取締役Ｓ計画準備室長",
            "board": "取締役",
            "title": "常務",
            "dept": "S計画準備室長"
          },
          {
            "date": "2003-06",
            "role": "専務取締役",
            "board": "取締役",
            "title": "専務"
          },
          {
            "date": "2005-06",
            "role": "代表取締役社長",
            "board": "代表取締役",
            "title": "社長",
            "is_ceo_appointed": true
          },
          {
            "date": "2009-06",
            "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"
          },
          {
            "date": "2010-06",
            "role": "代表取締役会長",
            "board": "代表取締役",
            "title": "会長"
          }
        ]
      }
    ],
    "html_url": "https://the-shashi.com/tse/4183/executives/ceo/fujiyoshi-kenji/",
    "term_start": "2005-06",
    "term_end": "2009-06",
    "api_url": "https://the-shashi.com/api/4183/ceo/fujiyoshi-kenji.json",
    "list_api_url": "https://the-shashi.com/api/4183/ceo.json",
    "predecessor": {
      "slug": "nakanishi-hiroyuki",
      "name": "中西宏幸",
      "api_url": "https://the-shashi.com/api/4183/ceo/nakanishi-hiroyuki.json"
    },
    "successor": {
      "slug": "tanaka-toshikazu",
      "name": "田中稔一",
      "api_url": "https://the-shashi.com/api/4183/ceo/tanaka-toshikazu.json"
    }
  }
}