{
  "spec_version": "6",
  "endpoint": "ceo-person",
  "stock_code": "4061",
  "company_name": "デンカ",
  "content_lang": "ja",
  "meta_lang": "en",
  "canonical_url": "https://the-shashi.com/tse/4061/executives/ceo/yamamoto-manabu/",
  "api_url": "/api/4061/ceo/yamamoto-manabu.json",
  "updated": "2026-10-29",
  "license": "© 2026 Yutaka Sugiura. All rights reserved.",
  "attribution": "The社史 (the-shashi.com) — https://the-shashi.com/tse/4061/executives/ceo/yamamoto-manabu/",
  "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": "yamamoto-manabu",
    "name": "山本学",
    "kana": "やまもと　まなぶ",
    "surname": "山本",
    "given_name": "学",
    "origin": "生え抜き（1981年入社）。電子材料事業部長・経営企画室長を経て社長へ",
    "origin_type": "生え抜き",
    "hometown": null,
    "education": "早稲田大学政治経済学部 (1981)",
    "prev_role": "取締役兼専務執行役員",
    "career": [
      {
        "company": "デンカ",
        "from": "1981-04",
        "to": null,
        "roles": [
          {
            "date": "1981-04",
            "role": "入社",
            "event": "入社"
          },
          {
            "date": "2009-04",
            "role": "執行役員",
            "officer": "執行役員"
          },
          {
            "date": "2013-06",
            "role": "取締役",
            "board": "取締役"
          },
          {
            "date": "2016-04",
            "role": "専務執行役員",
            "officer": "専務執行役員"
          },
          {
            "date": "2017-04",
            "role": "代表取締役社長",
            "board": "代表取締役",
            "title": "社長",
            "is_ceo_appointed": true
          },
          {
            "date": "2021-04",
            "role": "代表取締役会長",
            "board": "代表取締役",
            "title": "会長"
          },
          {
            "date": "2021-04",
            "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": "2025-04",
            "role": "取締役特別顧問",
            "board": "取締役",
            "title": "特別顧問"
          }
        ]
      },
      {
        "company": "高圧ガス工業",
        "from": "2016-06",
        "to": "2019-06",
        "concurrent": true,
        "roles": [
          {
            "date": "2016-06",
            "role": "社外監査役",
            "board": "社外監査役"
          }
        ]
      }
    ],
    "html_url": "https://the-shashi.com/tse/4061/executives/ceo/yamamoto-manabu/",
    "term_start": "2017-04",
    "term_end": "2021-04",
    "api_url": "https://the-shashi.com/api/4061/ceo/yamamoto-manabu.json",
    "list_api_url": "https://the-shashi.com/api/4061/ceo.json",
    "predecessor": {
      "slug": "yoshitaka-shinsuke",
      "name": "吉髙紳介",
      "api_url": "https://the-shashi.com/api/4061/ceo/yoshitaka-shinsuke.json"
    },
    "successor": {
      "slug": "imai-toshio",
      "name": "今井俊夫",
      "api_url": "https://the-shashi.com/api/4061/ceo/imai-toshio.json"
    }
  }
}