{
  "spec_version": "5",
  "endpoint": "ceo-person",
  "stock_code": "5231",
  "company_name": "日本セメント",
  "content_lang": "ja",
  "meta_lang": "en",
  "canonical_url": "https://the-shashi.com/tse/5231/executives/ceo/tokune-yoshio/",
  "api_url": "/api/5231/ceo/tokune-yoshio.json",
  "updated": "2026-10-27",
  "license": "© 2026 Yutaka Sugiura. All rights reserved.",
  "attribution": "The社史 (the-shashi.com) — https://the-shashi.com/tse/5231/executives/ceo/tokune-yoshio/",
  "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": "tokune-yoshio",
    "name": "徳根吉郎",
    "kana": "とくね　よしお",
    "origin": "生え抜き（1920年入社）。九州帝国大学で応用化学を修めた技術者で、常務取締役から、財閥解体で退いた浅野一族に代わって社長に就いた",
    "origin_type": "生え抜き",
    "milestone": "浅野家以外で初",
    "hometown": "北海道",
    "birthdate": "1896",
    "education": "九州帝国大学応用化学科 (1920)",
    "prev_role": "常務取締役",
    "career": [
      {
        "company": "日本セメント",
        "from": 1920,
        "to": null,
        "roles": [
          {
            "date": "1920",
            "role": "浅野セメント入社"
          },
          {
            "date": "1942",
            "role": "取締役"
          },
          {
            "date": "1943-07",
            "role": "常務取締役"
          },
          {
            "date": "1946-04",
            "role": "代表取締役社長",
            "is_ceo_appointed": true
          },
          {
            "date": "1949-09",
            "role": "社長退任",
            "is_ceo_retired": true,
            "retirement_basis": "history"
          },
          {
            "date": "1949-09",
            "role": "取締役会長"
          }
        ]
      }
    ],
    "references": [
      {
        "source": "日本企業要覧 1964年版",
        "url": "https://dl.ndl.go.jp/pid/2522059/1/92",
        "for": [
          "career",
          "education",
          "hometown",
          "birthdate"
        ]
      },
      {
        "source": "百年史（日本セメント、1983年）第5章 戦後の混乱と復興",
        "url": "https://dl.ndl.go.jp/pid/11956329",
        "for": [
          "career",
          "origin"
        ]
      },
      {
        "source": "建設技術者のためのセメント・コンクリート（徳根吉郎訳）国立国会図書館サーチの書誌（著者標目 トクネ, ヨシオ）",
        "for": [
          "kana"
        ]
      }
    ],
    "html_url": "https://the-shashi.com/tse/5231/executives/ceo/tokune-yoshio/",
    "term_start": "1946-04",
    "term_end": "1949-09",
    "api_url": "https://the-shashi.com/api/5231/ceo/tokune-yoshio.json",
    "list_api_url": "https://the-shashi.com/api/5231/ceo.json",
    "predecessor": {
      "slug": "asano-taijiro",
      "name": "浅野泰治郎",
      "api_url": "https://the-shashi.com/api/5231/ceo/asano-taijiro.json"
    },
    "successor": {
      "slug": "inoue-eiki",
      "name": "井上英煕",
      "api_url": "https://the-shashi.com/api/5231/ceo/inoue-eiki.json"
    }
  }
}